Since the city was founded in AD 452, Venice was riddled with invasions, wars and hostile takeovers. From the Turks to Napoleon Bonaparte, everyone wanted a piece of Venice. After the Third War of Independence ended in 1866, Venice was rightfully returned to the Kingdom of Italy. The trials and tribulations that the city experienced at the onset of it's founding is evident in the architecture and art throughout Venice. The heart of Venice is Saint Mark's square and is a hustle and bustle of activity. Here stands Saint Mark's Cathedral, one of the most famous cathedrals in the entire world. Originally built in 828, the building was destroyed by a fire in 976. When the structure was finally rebuilt between 1047 and 1071, the cathedral was deemed just as opulent as the original. This emblem of Venice stands as an excellent testament to Byzantine architecture. Also sharing the square is Doges' Palace. Destroyed on four occasions by fire, the palace was rebuilt each time. Each reconstruction was grander than the one before it. It now acts as one of the best examples of the famed Italian Gothic style. Behind Doges' Palace is the Bridge of Sighs and rightfully so. The bridge connects the palace with Venice's public prisons and acted as the main route in which prisoners were led to hear their judgments. The Rialto, another famous Venetian bridge, spans the Grand Canal and is surrounded by shops.