The intersection of Via Vittorio Emanuele and Via Maqueda is the town 's historic center , Quattro Canti ( Four Corners ) , in a characteristic setting of two great Baroque churches ( San Giuseppe dei Teatini and Santa Caterina ) , the monumental 16th-century Pretoria Fountain by a Florentine sculptor , and the piazza of the same name .
San Giuseppe dei Teatini and Santa Caterina are the largest Baroque churches in the area .