Despite repeated assaults and heavy fighting, the Ottomans were unable to breach the defences and were forced to raise the siege after 22 days. The 5,000 Venetians and foreign mercenaries, together with 3,000 Corfiotes, under the leadership of Count von der Schulenburg who commanded the defence of the island, were victorious once more. The success was owed in no small part to the extensive fortifications, where Venetian castle engineering had proven itself once again against considerable odds. The repulse of the Ottomans was widely celebrated in Europe, Corfu being seen as a bastion of Western civilization against the Ottoman tide. Today, however, this role is often relatively unknown or ignored, but was celebrated in Juditha triumphans by the Venetian composer Antonio Vivaldi. Venetian policies and legacy Corfu's urban architecture differs from that of other major Greek cities, because of Corfu's unique history. From 1386 to 1797, Corfu was ruled by Venetian nobility; much of the city reflects this era when the island belonged to the Republic of Venice, with multi-storeyed buildings on narrow lanes. The Old Town of Corfu has clear Venetian influence and is amongst the World Heritage Sites in Greece. It was in the Venetian period that the city saw the erection of the first opera house (Nobile Teatro di San Giacomo di Corfù) in Greece. Many Venetian-speaking families settled in Corfu during these centuries; they were called Corfiot Italians, and until the second half of the 20th century the Veneto da mar was spoken in Corfu. During this time, the local Greek language assimilated a large number of Italian and Venetian words, many of which are still common today. The internationally renowned Venetian-born British photographer Felice Beato (1832–1909) is thought to have spent much of his childhood in Corfu. Also many Italian Jews took refuge in Corfu during the Venetian centuries and spoke their own language (Italkian), a mixture of Hebrew-Italian in a Venetian or Apulian dialect with some Greek words. Venetians promoted the Catholic Church during their four centuries of rule in Corfu. Today the majority of Corfiots are Greek Orthodox, but the small Catholic minority (5%), living harmoniously with the Orthodox community, owes its faith to these origins. These contemporary Catholics are mostly families who came from Malta, but also from Italy, and today the Catholic community numbers about 4,000 ( of Maltese descent), who live almost exclusively in the Venetian "Citadel" of Corfu City.