The oratory was built with funds provided by the neighborhood between 1655 and 1656, designed by Giacomo Franchini, and has stucco decoration by Pietro d'Austo Montini. In the facade, the stucco God the father with angels emerges above the repainted fresco of the Madonna and child painted in 1742 by Francesco Feliciati. The Chapel of the Madonna del Rosario is a small, Baroque style, originally Roman Catholic, but now deconsecrated oratory or church located between via San Marco and via della Diana in the contrada of the Chiocciola (snail), in the city of Siena, Tuscany, Italy. It association with the neighborhood also gained the scenic building the name of the Chapel of the Chiocciola. The chapel is located some 200 meters west and uphill of Porta San Marco.