サン・ジョヴァンニ洗礼堂
In Florence, the guilds were responsible for the upkeep and business of the Florence Cathedral, and the Florence Baptistery. Particularly, the "Arte della lana", the wool guild, was responsible for the cathedral, and the "Arte della calimala", the cloth guild, for the Baptistry. In addition to other responsibilities, these guilds oversaw the establishment and maintenance of the chapel that sang for services at these two institutions, as well as later at Santissima Anunnziata. A chapel was established as early as 1438, although polyphonic music had been performed at the cathedral for at least thirty years prior. It is believed that the Medici were responsible for, or at least involved in, the creation and continuation of the polyphonic chapel in Florence.