The sumptuous halls of the fourteenth-century Palazzo Pubblico, located in the fascinating Piazza del Campo, house the Civic Museum, one of the most interesting art collections in Siena. Among the many masterpieces of the Sienese School, dating from a period spanning the fourteenth to the sixteenth century, the Museum, set up in the 1930s, includes paintings by Sodoma - the Holy Family and St. Leonard are his, preserved in the chapel of the Palazzo, and a Madonna and Child with Saints, exhibited in one of the halls laid out around the courtyard that make up the magnificent Art Gallery - by Martino di Bartolomeo, Sano di Pietro, Taddeo di Bartolo, Luca Giordano, and Domenico Beccafumi, whose fine frescoes embellish the ceiling of the Council Chamber. The gem of the collection is kept in the lavish hall known as the Hall of the Mappamondo - so-called because of the great revolving disk, portraying the territory of the Republic surrounded by the other lands known at the time, painted by Ambrogio Lorenzetti and nowadays lost - the highly famed Maestą, painted in 1315 by Simone Martini; also remarkably interesting is, in the large Hall of Peace, also called Hall of the Nine, the grandiose pictorial-allegorical cycle, frescoed between 1337 and 1339 by Lorenzetti, with the Effects of Good Government and Bad Government and, in the Hall of the Columns, the fifteenth-century Massacre of the Innocents by Matteo di Giovanni. In the monumental Loggia of the Nine, opening on to the picturesque piazza and the Sienese countryside outside, are housed the marble bas-reliefs which once splendidly adorned the Gaia Fountain, the fifteenth-century work of Jacopo della Quercia. In addition, the collection is enriched by interesting and fine collections of coins, arms, gold jewellery, majolica and Sienese ceramics as well as by a splendid collection of sculptures - including the majestic Tristitia by Emilio Gallori - and by valuable Florentine and French tapestries.