Cologne Cathedral (German: Kölner Dom, pronounced [ˌkœlnɐ ˈdoːm], officially Hohe Domkirche zu Köln, English: High Cathedral Church at Cologne) is a Catholic cathedral located in Cologne, North Rhine-Westphalia. It serves as the seat of the Archbishop of Cologne and the administration of the Archdiocese of Cologne. The cathedral is a well-known symbol of German Catholicism and Gothic architecture. It was declared a World Heritage Site in 1996. It is Germany’s most visited landmark, welcoming about 6 million visitors each year. Standing at 157 meters (515 feet), the cathedral is the tallest twin-spired church in the world, the third tallest church in Europe after Sagrada Família and Ulm Minster, and the tallest cathedral globally.

Construction of Cologne Cathedral began in 1248 but was paused around 1560. Work to complete the cathedral started again around 1814, though proper funding did not arrive until the 1840s. The cathedral was finished according to its original medieval design in 1880. The two large spires of the cathedral give it the largest façade of any church in the world.

The cathedral’s medieval builders planned a grand structure to house the reliquary of the Three Kings and to serve as a place of worship for the Holy Roman Emperor. Although construction was left unfinished during the medieval period, the cathedral eventually became a "masterpiece of exceptional intrinsic value" and "a powerful testimony to the strength and persistence of Christian belief in medieval and modern Europe." In Cologne, only the telecommunications tower is taller than the cathedral.

Predecessor buildings

Maternus of Cologne was the first bishop of Cologne around the year 313. At that time, the Christian community in Cologne was small and met in a residential building, not a church. This building is believed to have been located on the cathedral hill, near today's choir area. After the fall of Roman rule on the Rhine, Merovingian kings who lived in Cologne built an episcopal church on this site during the 6th century. This church was about 40 to 50 meters long and had an ambon, a platform used for readings. It is thought that King Theudebert I built this church. The building served as a burial place for the royal family, including the king's wife, Wisigard, who was buried there around 537. However, archaeological findings under the cathedral choir do not allow a complete reconstruction of the Merovingian-era buildings.

Construction of Cologne Cathedral was completed in 1880. At that time, the cathedral was 157 meters tall, making it the tallest building in the world. It took 632 years to build. The two towers are nearly the same height, differing by only a few centimeters. In late antiquity, a baptistery existed to the east of the cathedral choir. Early Christians were baptized by stepping into knee-deep water and being completely doused. A baptismal font from the 5th century was likely originally located in the garden of a Roman house that served as a Christian meeting place. Later, a baptistery built above the pool may have been combined with the cathedral church, though no archaeological evidence supports this. When Hildebold Cathedral was built and equipped with a new baptismal font, only the baptismal piscina (a basin used for baptism) remained from the old baptistery. Today, this piscina, located at the base of the cathedral, is considered the oldest evidence of Christian worship in Cologne.

During the Carolingian period, the Old Cathedral was built on the cathedral hill and consecrated in 870. It is now known as Hildebold Cathedral, named after Bishop Hildebold, who was a close advisor to Charlemagne and died in 818. It is unclear how much Bishop Hildebold contributed to the construction, but he likely started the project with Charlemagne’s support. The bishop’s residence was originally located near the cathedral.

Hildebold Cathedral was about 95 meters long and was one of the largest Carolingian churches ever built. It became a model for many churches in the early Holy Roman Empire. It was constructed as a basilica with two choirs: the east choir was dedicated to Mary, the mother of Jesus, and the west choir honored Saint Peter. The cathedral’s design and patronage reflected its connection to Old St. Peter’s Basilica in Rome, emphasizing Cologne’s claim as a holy city and faithful daughter of the Roman Church. Among its important relics were the reliquary-staff and chains of Saint Peter. The Hillinus Codex, a 11th-century manuscript, shows Hildebold Cathedral in a realistic depiction for its time. Today, the foundation walls of the Carolingian basilica are visible due to cathedral excavations.

On July 23, 1164, Archbishop Rainald of Dassel, the Imperial Archchancellor of Cologne, brought the bones of the Three Wise Men from Milan to Cologne. This event was seen as a "propaganda success" and was given to the archbishop by Emperor Frederick Barbarossa as war spoils. The relics were considered worthy of veneration after their arrival. Whether Rainald of Dassel or Milanese leaders were responsible for their discovery is debated in academic studies. Between 1190 and 1225, the Shrine of the Three Kings was created for these saints, regarded as one of the most advanced goldsmith works of the Middle Ages. The shrine was placed in the center of the Old Cathedral, making Cologne a major pilgrimage site in Europe. To manage the large crowds of pilgrims, an office called the custos regum ("guardian of the kings") was established after 1162. However, the cathedral’s narrow side portal was not well-suited for pilgrims, as it had to serve as both an entrance and exit.

With the start of the Gothic cathedral in 1248, the Old Cathedral was gradually demolished. However, careless demolition and fire destroyed most of the Old Cathedral, including the east choir, though the Shrine of the Three Kings was saved. The western parts of Hildebold Cathedral were temporarily rebuilt and remained until 1322, when the Gothic choir was completed and construction of the Gothic nave began.

Building history of the Gothic cathedral

The foundation stone was laid on Saturday, August 15, 1248, by Archbishop Konrad von Hochstaden. The eastern arm was completed under the direction of Master Gerhard. It was consecrated in 1322 and sealed off with a temporary wall to allow work to continue. Eighty-four misericords in the choir date from this building phase. This work stopped in 1473, leaving the south tower complete to the belfry level and crowned with a large crane. The crane remained as a landmark of the Cologne skyline for 400 years. Some work on the nave between the west front and the eastern arm continued intermittently, but this also stopped during the 16th century.

• The unfinished cathedral in 1820, engraved by Henry Winkles. A large crane on the tower is visible in the picture.
• The unfinished cathedral in 1855. The medieval crane was still in place, and work on the nave had started again in 1814.
• The unfinished cathedral in 1856. The east end was finished and roofed, while other parts of the building were at different stages of construction.

In the 19th century, Romantic interest in the Middle Ages and the discovery of the original plan for the façade led the Protestant Prussian Court, working with the church, to commit to completing the cathedral. This was done through the effort of the public. The Central-Dombauverein, founded in 1842, raised two-thirds of the costs, while the Prussian state covered the remaining third. The state saw this as a way to improve relations with Catholic people it had gained in 1815, especially after 1871, when the project was seen as a symbol of German nationhood.

Construction began again in 1842, following the original medieval plans and drawings, but using modern techniques, including iron roof girders. Ernst Friedrich Zwirner led the construction until his death in 1861. He designed parts of the cathedral, including a chapel for St. Mary and the crossing tower. The nave was completed, and all three towers were added. The bells were installed in the 1870s. The largest bell is called St. Petersglocke.

The completion of Germany's largest cathedral was celebrated on October 15, 1880, 632 years after construction began. Emperor Wilhelm I attended the celebration. At 157.38 meters (516.3 feet) tall, it was the world's tallest building for four years until the Washington Monument was completed.

The twin spires of the cathedral were a navigational landmark for Allied aircraft during World War II. The cathedral was hit by fourteen bombs during the war. Though badly damaged, it remained standing in a city that had been completely flattened.

On March 6, 1945, a battle took place near the cathedral between American tanks of the 3rd Armored Division and a German Panther tank. The Panther destroyed two Sherman tanks, killing three soldiers, before being destroyed by a T26E3 Pershing tank. Film footage of the battle still exists.

In 1944, Willy Weyres became the cathedral's architect. Repairs to war damage were completed, and the cathedral reopened in 1956 under Weyres' supervision. The crossing tower, completed in 1860 and designed by Zwirner, was severely damaged but remained structurally sound. In 1965, Weyres redesigned the damaged tower in an Art Deco style, with decorative angels designed by Erlefried Hoppe. This change, along with the removal of St. Mary's Chapel, was controversial.

A repair to part of the northwest tower, done in 1944 with poor-quality bricks from a nearby ruined building, remained visible until 2005, when it was restored to its original appearance.

In 1946, archaeological excavations began to check if the bombings had damaged the cathedral's foundations. Led by Otto Doppelfeld, the work continued until 1997 and revealed details about earlier buildings on the site.

Constant repair and maintenance are needed because wind, rain, and pollution slowly damage the stones. The Dombauhütte, established to build and maintain the cathedral, employs skilled stonemasons. Half the costs of repairs are still covered by the Dombauverein.

• The west front of the completed cathedral in 1911
• The cathedral during Allied air raids, March 9, 1945
• A U.S. soldier and a destroyed Panther tank, April 4, 1945
• An anti-Soviet propaganda poster, 1953
• The cathedral in the 1960s, showing the damaged crossing tower

On August 18, 2005, Pope Benedict XVI visited the cathedral during World Youth Day 2005. About one million people visited the cathedral during this time. The cathedral also hosted a televised performance of Beethoven's Missa Solemnis, conducted by Gilbert Levine.

On August 25, 2007, a new stained glass window was added to the south transept. The 113 square meter window, created by Gerhard Richter, was made of 11,500 small colored glass pieces arranged randomly to look like a colorful carpet. The cost was covered by donations. The space had been filled with plain glass since the original window was destroyed in World War II. Cardinal Joachim Me

Ongoing renovation

The cathedral is a medieval building that was constructed very strongly from a structural perspective. However, the stone structure needs regular maintenance and repairs. Barbara Schock-Werner, the cathedral's master builder, said: "Cologne Cathedral without scaffolding is not a dream, but a nightmare. It would mean that we would no longer be able to afford the cathedral."

The completed cathedral was only visible without scaffolding for a few years. After the official completion in 1880, finishing work continued for about 20 years. Richard Voigtel, the master builder, publicly stated shortly before his death in 1902 that the cathedral had finally been completed. However, in 1906, when parts of an angel figure fell from the façade, restoration work began again.

The cathedral is built from different types of rock, which weather at different rates based on their properties. The delicate buttresses and arches are exposed to all sides and are damaged by water, sulfur in the air, and bird droppings. Starting in the 1960s, acid rain severely harmed the stones, making them increasingly black. Air pollution controls from the 1990s reduced this damage.

Schlaitdorf sandstone, used for parts of the cathedral since 1842, shows the most severe weathering. It is constantly replaced, and until the 1980s, it was often replaced with Londorf basalt lava, which is very weather-resistant but gray instead of sandy beige. Since the 1990s, builders have tried to use stones as close as possible to the original sandstone. The cathedral works (Dombauhütte) have tested many methods to preserve the stones, but no fully effective solution has been found. Iron anchors and dowels holding the decorative parts are also beginning to rust, threatening to crack the stones and requiring replacement with steel. "It is therefore foreseeable that no one alive today will ever see the cathedral without scaffolding."

Regular repairs are needed because of occasional earthquake damage. For example, during the 1992 Roermond earthquake, a 400-kilogram (880-pound) finial on the eastern pinnacle of the southern transept gable broke off, damaged the roof, and destroyed the roof truss. Four other finials were loosened.

From May to November 2021, a remote-controlled drone took 200,000 high-resolution photos of the cathedral’s façade from a distance of 5 to 7 meters (16 to 23 feet). These photos were assembled into a digital 3D model with 25 billion polygons, providing an accurate representation of the cathedral. The model is 50 gigabytes in size and cost six figures to create.

In March 2026, the cathedral’s management announced plans to charge tourists admission fees in the second half of the year to support maintenance costs.

Architecture

The floor plan of Cologne Cathedral is very similar to that of Amiens Cathedral. The style and the width-to-height ratio of the central nave are also alike. The cathedral’s plan is shaped like a Latin Cross, a common feature in Gothic cathedrals. It has two aisles on each side, which help support one of the tallest Gothic vaults in the world. This vault is almost as tall as the one in Beauvais Cathedral, much of which was never completed or collapsed. Outside, the outward force of the vault is supported by flying buttresses, a feature common in French Gothic architecture. The eastern end has a single ambulatory, with the second aisle leading to a chevet of seven radiating chapels.

Inside, the medieval choir has more varied and less mechanical details compared to the 19th-century additions. It features a French-style arrangement with very tall arcades, a narrow triforium gallery lit by windows, and detailed tracery that connects with the windows above. The clerestory windows are tall and include some old figurative glass in the lower parts. Tall shafts stretch unbroken from the floor to the capitals at the base of the vault, which is divided into four parts.

The choir has many original features, including carved stalls, despite damage caused by French Revolutionary troops. A large stone statue of St. Christopher stands near the location of the cathedral’s earlier entrance, which was later moved during the late 19th century.

The nave includes many 19th-century stained glass windows. A set of five windows on the south side, called the Bayernfenster, were a gift from Ludwig I of Bavaria and reflect the painterly German style of that time.

Externally, the cathedral is most noticeable for its large spires, which are entirely Germanic in design. These spires are openwork, like those of Ulm, Vienna, Strasbourg, and Regensburg Cathedrals.

• An aerial view shows the cross-shaped plan.
• The cathedral from the south.
• The exterior of one of the spires.
• The main entrance shows the 19th-century decoration.

• The flying buttresses and pinnacles of the Medieval east end.
• Interior of the Medieval east end, showing the extreme height.
• This "swallows' nest" organ was built into the gallery in 1998 to celebrate the cathedral’s 750th anniversary.
• The crossing tower, which was completed in 1973 after war damage.

Treasures

One of the important items in the cathedral is the high altar, which was placed there in 1322. It is made of black marble, with a flat top that is 15 feet (4.6 meters) long. The front and sides are covered with white marble niches that hold carved figures, with the Coronation of the Virgin at the center. Joan Holladay has studied the symbols and images on the high altar.

The most famous artwork in the cathedral is the Shrine of the Three Kings. It was ordered by Philip von Heinsberg, who was the archbishop of Cologne from 1167 to 1191, and created by Nicholas of Verdun, who began work on it in 1190. It is believed to hold the remains of the Three Wise Men, whose relics were brought to Cologne by Frederick Barbarossa after he captured Milan in 1164. The shrine is shaped like a small church and is made of bronze and silver. It is covered in gold and decorated with details that look like parts of a building, carvings of people and scenes, colored glass, and precious stones. When the shrine was opened in 1864, bones and clothing were found inside.

Near the priests' room is the Gero Crucifix, a large wooden cross with some paint and gold decoration. It is thought to have been made around 960 for Archbishop Gero. It is the oldest large crucifix north of the Alps and one of the earliest large statues from the medieval period in northern Europe.

In the Sacrament Chapel is the Mailänder Madonna, a high Gothic carving showing the Virgin Mary and baby Jesus. It was made in the cathedral's workshop around 1290 to replace an earlier version that was destroyed in a fire. The Marienkapelle, or St. Mary's Chapel, holds an altarpiece painted by Stefan Lochner in the International Gothic style.

After the cathedral was completed in 1265, the radiating chapels were used as a place for burials. The remains of Saint Irmgardis were placed in St. Agnes' Chapel. Her sarcophagus, made of trachyte, was created by the cathedral's stone workers around 1280. Other artworks are kept in the Cathedral Treasury.

Two stone tablets are embedded in the cathedral's walls. They show the rules set by Archbishop Englebert II (1262–67) that allowed Jewish people to live in Cologne.

• The Crucifix of Bishop Gero, 10th century, the oldest known large crucifix
• The Shrine of the Three Kings
• St. Christopher statue by Tilman van der Burch, around 1470
• The Dombild Altarpiece of the Three Kings by Stefan Lochner

• Petrus- und Wurzel Jesse-Fenster, 1509
• Anbetungs-Fenster, 1846
• Modern stained glass window by Gerhard Richter (2007)

Church music

Cologne Cathedral has two pipe organs made by Klais Orgelbau: the Transept Organ, built in 1948, and the Nave Organ, built in 1998. People who play the organs at the cathedral have included Josef Zimmermann, Clemens Ganz (1985–2001), and Winfried Bönig (2001).

The cathedral has eleven church bells. Four of these bells are from the medieval period, and the three largest are bourdon bells. The first bell, called the Dreikönigsglocke (Bell of the Three Kings), weighs 3.8 tonnes (8,400 lb). It was cast in 1418, installed in 1437, and recast in 1880. Two other bells, the Pretiosa (10.5 tonnes or 23,000 pounds; the largest bell in the Western world at that time) and the Speciosa (5.6 tonnes or 12,000 pounds), were installed in 1448 and remain in the cathedral today.

In the 19th century, as the cathedral neared completion, there was a desire to add more bells. Kaiser Wilhelm I helped by providing French bronze cannons taken during the war of 1870–71. These 22 cannons were displayed outside the cathedral on 11 May 1872. A bell maker named Andreas Hamm in Frankenthal used the bronze to cast a bell weighing over 27 tonnes (60,000 lb) on 19 August 1873. The bell did not sound good, so another attempt was made on 13 November 1873. The Central Cathedral Association, which had agreed to pay for the bell, did not want it. A third attempt was made on 3 October 1874. The large bell was sent to Cologne and installed in the cathedral on 13 May 1875. This bell, called the Kaiserglocke, was eventually melted in 1918 to support the German war effort. It was the largest free-swinging bell in history.

The St. Petersglocke (Bell of St. Peter), weighing 24 tonnes (53,000 lb), was cast in 1922. It was the largest free-swinging bell in the world until a new bell was made in 2016 for the People’s Salvation Cathedral in Bucharest, Romania. This bell is only rung on eight major holidays, such as Easter and Christmas.

On Thursday, 3 March 2022, important cathedrals across Europe chimed together in a gesture of solidarity with Ukraine. People gathered to remember those killed during Russia’s invasion and to pray for peace. The Kölner Dom was among the cathedrals that participated.

Organisation

The Cathedral Chapter of Cologne is a group of priests who help the archbishop of Cologne manage the archdiocese. These priests, called canons (German: Domkapitular), are in charge of taking care of the spiritual needs of the Cologne Cathedral, especially by leading religious services inside the cathedral. They also have the duty of choosing the archbishop of Cologne based on the Prussian Concordat. The chapter includes the Provost and the Dean, along with about ten canons who live at the cathedral and four canons who do not live there.