Until the Second World War, the cathedral contained over sixteen ringing and quarter bells. The basis of the pre-war peal was five great bells with the tones F-sharp0, A0, C-sharp1, F-sharp1, G-sharp1. Nine bells of the pre-war peal survived the war; the great Godehard bell in the west tower was so severely damaged in an air raid that it could no longer be rung. The Bernard bell is in the
Bell cemetery in Hamburg and was irreparably damaged during transport there. Two bells were capable of being reused: the historical
Apostolica bell of bellfounder Johann Martin Roth of Mainz (1765), which could be integrated into the new peal, and another historic bell of Johann Martin Roth, the
Nikolaus bell, which was originally hung in the crossing tower and was moved to the
Nordparadies in 2010.
Refounding of 1960 After the Second World War it was planned to create a 12-toned peal, with six great bells in the west tower and six smaller bells in the crossing tower (the planned tones: G1, B1, C2, E2, F2 and G2). At first only a six tone peal was produced. In 1960 the bellfounder (Heidelberg) cast five new bells, which were installed in the west tower together with the
Apostolica bell. In the lower belfry of the tower hung the three deepest bells (1–3), while the three smaller bells (4–6) were in the upper belfry. The new peal (co-ordinated with the bells of the surrounding churches) was a semitone deeper than the original, so the
Apostolica bell had to be tuned a semitone lower to fit with the new bells. The new cathedral bells will be named after witnesses of the faith, who enjoy particular veneration in the Diocese of Hildesheim. Thus bell No. 8 will be named for Bishop Altfrid, one of the most important bishops of Hildesheim, who secured large contributions for the construction of the cathedral. Bell No. 9 will be named after Hedwig of Schlesien (or of Andechs), patron of refugees – since many refugees came to Hildesheim after the Second World War and were crucial in shaping it. On 16 November 2013 the new bells were cast by (Karlsruhe). The
Cantabona bell is the second biggest of Lower-Saxony after the Christus- und Friedensglocke (Bell of Christ and Peace) in the
Marktkirche, Hanover. == World Heritage Site ==