Sankt-Sebastian-Kirche, Romanesque cathedral in Magdeburg, Germany.

Sankt-Sebastian-Kirche is a Romanesque cathedral in Magdeburg built from brick with characteristic medieval architectural features. The building dominates the city skyline and combines its original Romanesque design with Gothic modifications added over the centuries.

Archbishop Gero laid the foundation stone around 1015 as a collegiate foundation; he was buried there in 1022. The Romanesque building burned in 1188 and 1207, and in the first half of the 14th century the old choir was demolished and replaced by a larger Gothic one, while the nave was remodelled as a late Gothic hall church on the Romanesque ground plan. Re-consecrated on 17 May 1489 by Archbishop Ernst, the church burned on 10 May 1631 during the storming of Magdeburg; the choir was rebuilt in 1663 and the first service held in 1692. After serving as a magazine and store, it was returned to Catholic use in 1878 and became cathedral of the new Diocese of Magdeburg in 1994.

The church's patron is Saint Sebastian, whose head relic was once carried along the diocese border when Henry IV's army approached; later a procession with the relic went from the cathedral to St. Sebastian every 20 January. Since 1994 the building has been the cathedral of the re-established Diocese of Magdeburg. In the 1950s and 1960s Christine Leweke made eight pictorial tapestries, each 100 by 150 cm, for the church.

The cathedral stands on the Route of Romanesque, and its two towers reach about 44 metres. The interior was redesigned around 2005, adding a covered cloister, a new sacristy and a chapter cemetery; look for the eight tapestries of 100 × 150 cm that Christine Leweke made for the church in the 1950s and 1960s.

The altar contains a tooth relic of St. Sebastian, sent from the skull relic kept at the Vienna Schottenstift for the altar's consecration. The church also holds eight pictorial tapestries, each 100 by 150 cm, created by Christine Leweke in the 1950s and 1960s.