Turning away from the castle and going beyond the Bollani Arch, projected by Andrea Palladio (1556), the visitor is met by the splendid view of Piazza Libertà, the heart of Udine. This magnificent square is frequently referred to as "the most beautiful Venetian square on mainland". The most important sights of the city are to be found here; the remains of a Venetian past that began in 1420 and lasted until the end of the 18th century.