church is still in the possession of the town. Before 1444, a chapel consisting of a single bay was added to the eastern end of the ambulatory, its five walls forming five-eighths of an octagon. This was the last Gothic extension to the church. It was used for celebrating the so-called Hours of the Virgin, as part of the veneration of the Virgin Mary, reflected in its name (Our Lady's Hours Chapel) or (Singers' Chapel). In total, St Mary's Church has nine larger chapels and ten smaller ones that serve as sepulchral chapels and are named after the families of the Lübeck city council that used them and endowed them. Destruction and restoration In an air raid by the RAF on 28-29 March 1942 – the night of Palm Sunday – the church was almost completely destroyed by fire, together with about a fifth of the Lübeck city centre, including Lübeck Cathedral and . Among the artefacts destroyed was the famous (Danse Macabre organ), an instrument played by Dieterich Buxtehude and probably Johann Sebastian Bach. Other works of art destroyed in the fire include the Mass of Saint Gregory by Bernt Notke, the monumental Danse Macabre, originally by Bernt Notke but replaced by a copy in 1701, the carved figures of the rood screen, the Trinity altarpiece by Jacob van Utrecht (formerly also attributed to Bernard van Orley) and the Entrance of Christ into Jerusalem by Friedrich Overbeck. Sculptures by the woodcarver Benedikt Dreyer were also lost in the fire: the wooden statues of the saints on the west side of the rood screen and the organ sculpture on the great organ from around 1516–18 and Man with Counting Board. Also destroyed in the fire were the mediaeval stained glass windows from the , which were installed in St. Mary's Church from 1840 on, after the St. Mary Magdalene Church was demolished because it was in danger of collapse. Photographs by Lübeck photographers like give an impression of what the interior looked like before the War. The glass window in one of the chapels has an alphabetic list of major towns in the pre-1945 eastern territory of the German Reich. Because of the destruction it suffered in World War II, St. Mary's Church is one of the Cross of Nails centres. A plaque on the wall warns of the futility of war. The church was protected by a makeshift roof