Right and left two very old streets diverge, the Via Lambertesca and the Borgo Santissimi Apostoli, with splendid mediæval towers. In the former, at the angle of the Via di Por Santa Maria, are the towers of the Girolami and Gherardini, round which there was fierce fighting in the expulsion of the Ghibellines in 1266. Opposite, at the opening of the Borgo Santissimi Apostoli, are the towers of the Baldovinetti (the tower of San Zenobio) and of the Amidei--_la casa di che nacque il vostro fleto_, as Cacciaguida puts it to Dante: "the house from which your wailing sprang," whose feud with the Buondelmonti was supposed to have originated the Guelf and Ghibelline factions in Florence. And further down the Borgo Santissimi Apostoli, at the opening of the Chiasso delle Misure, is the tall and stately tower of these Buondelmonti themselves, who also had a palace on the opposite side of the street. The old church of the Santissimi Apostoli, in the Piazza del Limbo, has an inscription on its façade stating that it was founded by Charlemagne, and consecrated by Archbishop Turpin, with Roland and Oliver as witnesses. It appears to have been built in the eleventh century, and is the oldest church on this side of the Arno, with the exception of the Baptistery. Its interior, which is well preserved, is said to have been taken by Filippo Brunelleschi as the model for San Lorenzo and Santo Spirito. In it is a beautiful Ciborium by Andrea della Robbia, with monuments of some of the Altoviti family. [Illustration: THE TOWER OF S. ZANOBI]