The original Kaiser Wilhelm Memorial Church on the site was built in the 1890s. It was badly damaged in a bombing raid in 1943. The present building, which consists of a church with an attached foyer and a separate belfry with an attached chapel, was built between 1959 and 1963. The damaged spire of the old church has been retained and its ground floor has been made into a memorial hall. The Memorial Church today is a famous landmark of western Berlin, and is nicknamed by Berliners 'der Hohle Zahn', meaning 'The Hollow Tooth'.
Kaiser Wilhelm II decided to name the church in honor of his grandfather Kaiser Wilhelm I. The foundation stone was laid on March 22, 1891, which was Wilhelm I's birthday. The competition for the design was won by Franz Schwechten who planned for a large church to be built in Romanesque Revival style, including 2,740 square metres of wall mosaic. The spire was 113 metres high and the nave seated over 2,000 people. The church was consecrated on September 1, 1895. By this time of the consecration the entrance hall in the lower section had not been completed. This was opened and consecrated on February 22, 1906. In the Second World War, on the night of November 23, 1943, the church was irreparably damaged in an air raid. The church was largely destroyed but part of the spire and much of the entrance hall survived.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.