Began in stone in 1087 and finished in brick in 1110. Basilical floor plan with naves separated by three semicircular arches, covered with a stone ribbed barrel vault. Above the presbytery of the Chancery there is a square brick tower with decreasing sections. Remarkable collection of capitals inside and a magnificent Christ by Gregorio Fernández.
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- Mudéjar art (Mudejar-Romanesque)
- XI century
- BIC 03/06/1931
- Adress: 4 Km from Sahagún San Pedro de las Dueñas
- In use for worship, it can be visited.