The Vienna Central Cemetery (Wiener Zentralfriedhof) is one of the largest cemeteries in the world, largest by number of interred in Europe and most famous cemetery in Vienna. Unlike many others, the Vienna Central Cemetery is not one that has evolved slowly with the passing of time. The decision to establish a new, big cemetery for Vienna came in 1863 when it became clear that – due to industrialisation – the city's population would eventually increase to such an extent that the existing communal cemeteries would prove insufficient.
The cemetery was opened on All Saints' Day in 1874, far outside Vienna's city borders. Today there are over 330,000 graves.
The church in the centre of the cemetery is named Karl-Borromäus-Kirche (Charles Borromeo Church), but is also known as Karl-Lueger-Gedächtniskirche (Karl Lueger Memorial Church) because of the crypt of the former mayor of Vienna below the high altar. This church in Art Nouveau style was built in 1908–1910 by Max Hegele. The crypt of the Austrian Federal Presidents is located near the Dr. Karl-Lueger Memorial Church. Beneath the sarcophagus, is a burial vault with stairs leading down to a circular room whose walls are lined with niches where the deceased in an urn or coffin can be interred.
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.