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 city walls of Avila were built in the 11th century to protect the citizens from the Moors. They have been well maintained throughout the centuries and are now a major tourist attraction as well as a UNESCO World Heritage Site. Visitors can walk around about half of the length of the walls.
The layout of the city is an even quadrilateral with a perimeter of 2,516 m. Its walls, which consist in part of stones already used in earlier constructions, have an average thickness of 3 m. Access to the city is afforded by nine gates of different periods; twin 20 m high towers, linked by a semi-circular arch, flank the oldest ones, Puerta de San Vicente and Puerta del Alcázar.