 Among these was Michelangelo Buonarroti, the artist and architect, who had been placed in command of the fortification of the city; departing on 10 September after having fruitlessly warned the gonfaloniere that Malatesta Baglioni would betray the city, he would nevertheless return in mid-November to take up his post once again, in which capacity he would continue to serve until the end of the siege.In preparations for the defense of the city, a number of outlying convents and monasteries were destroyed, including the convent church of San Giovanni Evangelista, a monastery of Augustinian friars outside the Porta San Gallo, the convents of Monte Domini and Monticelli, the Camaldolese monastery of San Benedetto fuori della Porta Pinti, San Donato in Polverosa, and San Giusto degli Ingesuati, together with its frescoes by Pietro Perugino.Other works painted for San Giusto by Perugino, along with its altarpiece by Domenico Ghirlandaio, are preserved in the Uffizi.