The Hermitage of Santa María de La Piscina (Spanish: Ermita de Santa María de La Piscina) is a medieval church located in San Vicente de la Sonsierra, La Rioja, Spain.

It was apparently founded by Ramiro Sánchez to house relics from the Holy Land, notably a supposed fragment of the True Cross.

An important example of Romanesque architecture, it was declared a protected monument in 1931, the current designation being Bien de Interés Cultural.

[citation needed] There are burial sites of interest in the vicinity of the church.

This article about a Spanish Christian monastery, abbey, priory or other religious house is a stub.