Brüggemann from 1514 to 1521, is 12.60 meters high and depicts biblical history from Christ's arrest to Ascension (modelled after Albrecht Dürer's "Little Passion"). In the central piece, Jesus carrying the cross and the descent to hell are emphasized through larger carvings. Ascension and Pentecost are depicted on the altar wings. Next to the central piece, Adam and Eve can be seen. Above everything, Jesus Christ hovers as pantocrator. Originally, the altar was manufactured for the Augustinian Chorherrenkirche (i.e. collegiate church) in Bordesholm. After the priory's dissolution, the Duke Christian Albrecht of Holstein-Gottorp arranged for the altar's transfer to Schleswig Cathedral in 1666. A young Emil Nolde helped with the altar's restoration in Flensburg at the end of the 19th century. Cenotaph of Frederick I In the northern choir nave, an elegant renaissance cenotaph for Frederick I, King of Denmark and Norway and Duke of Schleswig and Holstein, can be found. The tombstone, created for the choir in 1552 and put up there, was moved to its current position in 1901. It was called one of the "masterpieces of Dutch renaissance art in Northern Europe" (Marianne Mehling). Its creator is the Flemish sculptor Cornelis Floris de Vriendt. Instead of the usual seven virtues, the (empty) sarcophagus stands only on six. The Blue Madonna Jürgen Ovens (1623–1678) painted his Blue Madonna which was originally called Holy Family with Johannes, in 1669. It is situated on a pillar in the northern side nave. The influence of Anthony van Dyck is clearly visible on the baroque painting. Jürgen Ovens, born 1623 in Tönning, was a pupil of Rembrandt's and court painter of the Dukes of Holstein-Gottorp. The Blue Madonna is his most famous painting. A self-portrait from 1691 can be found in the Laurentius Church in Tönning. Other works of Ovens can be seen in the State Museum of Schleswig-Holstein in Castle Gottorf. Central Tower The central tower was constructed by Friedrich Adler between 1888 and 1894 from brick. At 112 meters, it is the second-largest church spire in Schleswig-Holstein, after the Marienkirche in Lübeck. The tower had fallen into disrepair in the early 1950s and was restored from 1953 to 1956. Burials Valdemar IV, Duke of Schleswig (?–1314) Eric II, Duke of Schleswig (1290–1325) Frederick I of Denmark Conrad von Reventlow Gustav Trolle Sophie of Pomerania Adolf, Duke of Holstein-Gottorp Christine of Hesse Frederick II, Duke of Holstein-Gottorp Philip, Duke of Holstein-Gottorp