Porta Ovile, Medieval city gate in Siena, Italy.

The Porta Ovile is a brick gate in Siena that connects two main streets while featuring solid defensive walls. This structure serves as an entry point and sits near a major Franciscan convent on the city's outskirts.

Construction began around 1230; the gate appears in Siena's Biccherna accounts as Porta di Vallerozzi in 1247 and 1250, and under its present name in 1251. In 1258 it was closed with wooden boards during the conflict that led to the Battle of Montaperti. The outer forecourt probably dates from 1471, and in early November 1554, during the siege by Florentine troops, the gate was walled up.

On the left inner side of the main gate is a fresco by Sano di Pietro, one of the oldest on Siena's walls, showing the Madonna and Child with Saints Ansano and Bernardino and angels. A wooden cross on the inner side was removed in 1930 and is now in the Bruco contrada museum; the present cross was made by contrada craftsmen and put back in March 2001.

The gate is accessible by several bus routes and sits near other landmarks worth exploring. Visitors can walk through the area and use the gate as a reference point to navigate this section of the city.

The wooden cross now on the inner side of the main gate is not the original: the old one was removed in 1930 and is kept in the Contrada Bruco museum, while local craftsmen made the present cross and put it back in March 2001.