Piazza Vigliena, which is popularly referred to as simply the Quattro Canti, which translated from Italian means "four corners", is one of the main Baroque square in Palermo, capital of Sicily. It is located on persechini of Corso Vittorio Emanuele, formerly Cassaro, and via Maqueda. The creation of the square refers to the early 17th century, when in the maze of streets of old Palermo by order of the Spanish Viceroy of Macheda was laid straight street perpendicular to Cassaro. Later new street received the name of its founder.

Today the Piazza Villena, with its buildings in the Sicilian Baroque is one of the most popular tourist attractions. A large part of the architectural ensemble of the square was designed by Giulio Lasso and built in the first half of the 17th century by the architect Giuseppe de Avantsato. The Piazza has a very unusual octagonal form, since the four corners of the buildings, facing her, were specially bent. In addition, the four-storey facades of these buildings are made in the same style, which gives the area a finished appearance: the lower level of each building is decorated by a fountain with a statue of one of the seasons, on the middle tier you can see statues of Spanish kings Philip II, Philip III, Philip IV and the Emperor Charles V, who at various times were the rulers of the Kingdom of Sicily, and on the top tier are placed statues of saints Agatha, Christina, Ninfa and Hydrates them until the 17th century revered patronesses of Palermo. Later these saints became the patroness of urban neighborhoods that begin behind each statue. In the southwest corner of Piazza Vilhena stands the Catholic Church of San Giuseppe dny Teatini is one of the most striking examples of Sicilian Baroque. In the 17th century the Quattro Canti, was one of the largest samples of urban planning in Europe.