The Chapel of San Michele Arcangelo in Semifonte is situated near Petrognano, a hamlet included in the municipality of Barberino Val d'Elsa.
The little octagonal chapel, topped by a cupola that exactly replicates, on a scale of 1:8, the dome over the Florentine Cathedral of Santa Maria del Fiore, was built in 1594-7 to the design of Santi di Tito.
The chapel was commissioned by Giovan Battista di Neri Capponi, owner of the Renaissance Villa of Petrognano, and Canon of the Cathedral of Santa Maria del Fiore. To build the small church, he was obliged to ask permission of Grand Duke Ferdinand I, since the ancient ban on building in that area was still in force. The land, once occupied by the Castle of Semifonte destroyed by the Florentines in 1202, belonged to the Canon.
Brunelleschi’s design is faithfully repeated in the chapel’s octagonal layout, derived from the impost tambour of the cupola over Santa Maria del Fiore and including the double-shell structural design, while differences appear in the windows of the tambour - here rectangular and not circular - and in the lantern, which has no openings.