for the rest of the war, and the vaulted ceiling of the chancel was repaired. Reconstruction proper began in 1947, and was largely complete by 1959. In view of the previous damage by fire, the old wooden construction of the roof and spires was not replaced by a new wooden construction. All church spires in Lübeck were reconstructed using a special system involving lightweight concrete blocks underneath the copper roofing. The copper covering matched the original design and the concrete roof would avoid the possibility of a second fire. A glass window on the north side of the church commemorates the builder, , who invented this system. In 1951, the 700th anniversary of the church was celebrated under the reconstructed roof; for the occasion, Chancellor Konrad Adenauer donated the new tenor bell, and the Memorial Chapel Against War with broken bells in the South Tower was inaugurated. In the 1950s, there was a long debate about the design of the interior, not just the paintings (see below). The predominant view was that destruction had restored the essential, pure form. The redesign was intended to facilitate the dual function that St. Mary's had at that time, being both the diocesan church and the parish church. In the end, the church held a limited competition, inviting submissions from six architects, including and , the latter's design being largely accepted on 8 February 1958. At the meeting, the bishop, , vehemently – and successfully – demanded the removal of the Fredenhagen altar (see below). The redesign of the interior according to Boniver's plans was carried out in 1958–59. Since underfloor heating was being installed under a completely new floor, the remaining memorial slabs of Gotland limestone were removed and used to raise the level of the chancel. The chancel was separated from the ambulatory by whitewashed walls high. The Fredenhagen altar was replaced by a plain altar base of muschelkalk limestone and a crucifix by Gerhard Marcks suspended from the transverse arch of the ceiling. The inauguration of the new chancel was on 20 December 1959. At the same time, a treasure chamber was made for the Danzig Parament Treasure from St. Mary's Church in Danzig (now Gdańsk), which was transferred to Lübeck after the War. The Parament Treasure is now exhibited at St. Anne's Museum), where a large organ loft had been built. The organ itself was not installed until 1968. The