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"St. Stephen's Cathedral (more commonly known by its German title Stephansdom) is the mother church of the Roman Catholic Archdiocese of Vienna and the seat of the Archbishop of Vienna, Christoph Cardinal Schönborn, OP. The current Romanesque and Gothic form of the cathedral, seen today in the Stephansplatz, was largely initiated by Duke Rudolf IV (1339–1365) and stands on the ruins of two earlier churches, the first a parish church consecrated in 1147. The most important religious building in Vienna, St. Stephen's Cathedral has borne witness to many important events in Habsburg and Austrian history and has, with its multi-coloured tile roof, become one of the city's most recognizable symbols. The funeral of the Italian composer, Antonio Vivaldi was held in this cathedral in 1741.
History
By the middle of the 12th century, Vienna had become an important centre of German civilization in eastern Europe, and the four existing churches, including only one parish church, no longer met the town's religious needs. In 1137, Bishop of Passau Reginmar and Margrave Leopold IV signed the Treaty of Mautern, which referred to Vienna as a civitas for the first time and transferred the St. Peter's Church to the Diocese of Passau. Under the treaty, Margrave Leopold IV also received from the bishop extended stretches of land beyond the city walls, with the notable exception of the territory allocated for the new parish church, which would eventually become St. Stephen's Cathedral. Although previously believed to have been built in an open field outside the city walls, the new parish church was in actuality likely built on an ancient cemetery dating back to Ancient Roman times; excavations for a heating system in 2000 revealed graves 2.5 metres below the surface, which were carbon-dated to the 4th century.[citation needed] This discovery suggests that an even older religious building on this site predated the St. Rupert's Church, which is considered today to be the oldest church in Vienna.
Growth of the cathedral, showing the Roman towers and Giant's Door from the burned-out first church (1137), the Romanesque second church (1263), the Gothic Albertine Choir (1340), and the Duke Rudolf IV additions (1359), which removed the second church, leaving Stephansdom as it appears today
Founded in 1137 following the Treaty of Mautern, the partially constructed Romanesque church was solemnly dedicated in 1147 to Saint Stephen in the presence of Conrad III of Germany, Bishop Otto of Freising, and other German nobles who were about to embark on the Second Crusade. Although the first structure was completed in 1160, major reconstruction and expansion lasted until 1511, and repair and restoration projects continue to the present day. From 1230 to 1245, the initial Romanesque structure was extended westward; the present-day west wall and Romanesque towers date from this period. In 1258, however, a great fire destroyed much of the original building, and a larger replacement structure, also Romanesque in style and reusing the two towers, was constructed over the ruins of the old church and consecrated on 23 April 1263. The anniversary of this second consecration is commemorated each year by a rare ringing of the Pummerin bell for three minutes in the evening."