The church of Santi Pietro e Paolo is a Baroque style, Roman Catholic church, located on Via San Marco in the contrada of Chiocciola, in the city of Siena, region of Tuscany, Italy.

This church was begun in 1622 on designs of Flaminio del Turco; the brick façade was completed in 1678, work of Niccolò Franchini.

When the monastery was suppressed under Napoleonic rule, the Contrada della Chiocciola moved here the functions of the nearby Chapel della Chiocciola, which was then deconsecrated and now used as a stable for the Palio.

The interior is ornately decorated with stucco (1711) by Giovanni Antonio Mazzuoli.

Among the artworks in the interior is the main altarpiece of the Coronation of the Madonna with Saints (1520) by Andrea and Raffaello del Brescianino.