The church of San Giorgio in the Via Ricasoli is, in its present form, a work of the eighteenth century. But it occupies the site of a most ancient church, which was rebuilt in honour of the Battle of Montaperti; its curious campanile, best seen from below the walls, still dates from 1260, and its windows are supposed to represent the different companies of the Sienese who took part in the battle. Near the house of the liberal theological thinkers of the Cinquecento, Lelio and Fausto Sozzini (the founders of the Socinians), which was afterwards a palace of the Malavolti, the Via di Follonica leads to the church of San Giovanni Battista in Pantaneto, which possesses a terra-cotta statue of the Baptist, ascribed to Giacomo Cozzarelli, and several pictures of scenes from his life by Rutilio Manetti. Lower down to the right is one of Siena's characteristic mediaeval fountains, the Fonte di Follonica, probably constructed in the early years of the thirteenth century. Opposite the Palazzo del Governo, is the Studio, the famous and still flourishing University of Siena. It contains a characteristically Sienese sepulchral monument of the later Trecento, representing the professor, Niccolò Aringhieri, lecturing to his pupils. In the Via Sallustio Bandini is the graceful brick palace that Francesco di Giorgio built for Messer Sallustio, the father of Mario and Francesco, and ancestor of the celebrated man of science. On the left are the remains of one of the _castellacce_, or private fortresses, of the thirteenth century. It is a curious turn of fortune that he of whom "all Tuscany sounded" after Montaperti, and of whom "they hardly whispered in Siena" after his fall at Colle,[151] should have given his name to the most conspicuous modern church in his native city. The Madonna of Provenzano was raised to the Blessed Virgin as Protectress of Siena at the end of the sixteenth century. As an inscription to the left of the church bears witness (and there is a most unsavoury _novella_ of Pietro Fortini's to the same effect), this part of the city was notorious for its evil living, mainly given up to houses of ill-fame, especially in the days of the Spanish occupation. According to the legend, St Catherine had set up a little shrine with an image of the Madonna here, which was rediscovered by Brandano, who declared that here was the greatest treasure of Siena, and that "hither all the most honoured ladies of the nation shall one day come." In 1594 the image began to work miracles, and the present sanctuary was built in consequence.[152] The pictures that it contains are naturally by later Sienese masters, such as Francesco Vanni and Rustichino. In the sacristy there is what purports to be a portrait of Brandano.