In the Via delle Belle Arti, next to the picture gallery which has already been described, is the Biblioteca Comunale, once the meeting-place of the most famous of the Sienese academies--the _Intronati_. Among its treasures are two of the original letters sent by St Catherine from Rome to Stefano Maconi; they are not, however, in her own handwriting but appear, from internal evidence, to have been dictated by her to Barduccio Canigiani. Further on in the Via Cavour, to the left, is the exquisite little early Renaissance church of Sta. Maria delle Nevi, built shortly after 1470 for Giovanni de' Cinughi, Bishop of Pienza, probably from the designs of Francesco di Giorgio. The altar-piece, representing Our Lady as Queen of the Snows, with a predella illustrating the legend of the building of Sta. Maria Maggiore at Rome, was painted by Matteo di Giovanni in 1477; a most poetically conceived work and one of the most beautiful pictures of the Sienese Quattrocento. This part of the Terzo di Camollia was originally the famous Poggio Malavolti, where that great family had their towers and houses in a regular fortress as far as the recently demolished convent of the Cappuccine; it was surrounded with walls and had a gate near where Sta. Maria delle Nevi now stands. On the right the steep and picturesque Via Vallerozzi leads down the Costa d'Ovile, the scene of the massacre of 1371, to the Porta Ovile. Half way down is the oratory of San Rocco, the church of the Contrada of the Lupa, with frescoes by Manetti and Rustichino. The Fonte Nuova, a little off the street to the left, was built by Tino di Camaino in the fourteenth century. In the Via Garibaldi, on the way to the railway station, is the _Casa della Consuma_, the palace in which the _brigata spendereccia_, the extravagant young club of Sienese nobles recorded by Dante in canto xxix. of the _Inferno_, ran through their fortunes. There has been much throwing about of brains upon the question whether this notorious _brigata spendereccia_ is, or is not, to be identified with the _brigata nobile e cortese_ of which Folgore da San Gimignano sung, and whether Dante's "Niccolò who first discovered the rich usage of the clove"--who is usually said to have been either a Salimbeni or a Buonsignori--is the Niccolò di Nisi to whom Folgore dedicated his _corona_. However that may be, the present aspect of the _Casa della Consuma_ is prosaic and modern. In the same street is the oratory of the Brotherhood of St Sebastian, for which Bazzi painted that most wonderful of banners now in the Uffizi. It has early seventeenth century frescoes, illustrating the life of the martyr.