St. Catherine's Church is one of the five principal Lutheran churches of Hamburg. The base of its spire, dating from the 13th century, is the second oldest building preserved in the city, after the lighthouse on Neuwerk island. It is situated on an island near what was formerly the southern boundary of the medieval city, opposite the historic harbour area on the Elbe river. It traditionally served as the church of the seamen.
The earliest attestation to the existence of the church dates back to 1256. The main body, consisting of a triple nave, was rebuilt during the mid-15th century in the north German Brick Gothic style. In 1657 a Baroque rooftop was added to the spire, which thus reached a height of 115 meters. The church was heavily damaged in an air-raid during World War II, on 30 July 1943. It left only the outer walls and the base of the spire standing. The building was restored between 1950 and 1957.
St. Catherine's had an organ as early as the late 15th century, and by the 16th century it was considered the most important in Hamburg. This organ was replaced by a new organ built by Hans Stellwagen, rebuilt in 1670 and repaired by Johann Friederich Besser. In 1720, according to Johann Mattheson, this organ consisted of some 58 stops and approximately 88 ranks which may have made it the largest organ in the world at that time.
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.