of the Gesù (Church of Jesus): Located in the city centre, the church was built in 1564 in the late-Renaissance style by the Jesuits. It was built over a pre-existing convent of Basilian monks. Alterations in 1591 were completed in a Sicilian Baroque. The church was heavily damaged after the 1943 bombings, which destroyed most of the frescos. The interior has a Latin cross plan with a nave and two aisles, and has a particularly rich decoration of marbles, intarsia and stuccoes, especially in St Anne's Chapel. At the right is the Casa Professa, with a 1685 portal and a precious 18th century cloister. The building has been home to the Municipal Library since 1775. San Francesco di Assisi: church built between 1255 and 1277 in what was once the market district of the city, at the site of two pre-existing churches and was largely renovated in the 15th, 16th, 18th and 19th centuries, the last after an earthquake. After the 1943 bombings, the church was restored to its Medieval appearance, which now includes part of the original building such as part of the right side, the apses and the Gothic portal in the façade. The interior has a typical Gothic flavour, with a nave and two aisles separated by two rows of cylindrical pilasters. Some of the chapels are in Renaissance style, as well as the late 16th century side portals. The church includes precious sculptures by Antonio, Giacomo Gagini and Francesco Laurana. Of note are also statues built by Giacomo Serpotta in 1723. Church of the Magione: Officially known as the church of the Holy Trinity. This church was built in the Norman style in 1191 by Matteo d'Ajello, who donated it to the Cistercian monks. Squares and public monuments Quattro Canti is a small square at the crossing of the ancient main roads (now: Corso Vittorio Emanuele and Via Maqueda) dividing the town into its quarters (mandamenti). The buildings at the corner have diagonal baroque façades so the square has an almost octagonal form. Piazza Pretoria was planned in the 16th century near the Quattro Canti as the site of a fountain by Francesco Camilliani, the Fontana Pretoria. The monument to Charles V on Piazza Bologni, erected in 1631. City walls Palermo had two rings of city walls, many parts of which still survive. The first ring surrounded the ancient core of the Phoenician city, the Palaeopolis