Español: El monasterio de Santa María de Retuerta se encuentra situado en la orilla izquierda del río Duero, cerca de la localidad de Sardón de Duero, en la provincia de Valladolid. Es un monasterio perteneciente a la orden premostratense edificado en estilo tardorrománico, que fue fundado por Sancho Ansúrez, nieto del Conde Ansúrez.
Fue declarado Monumento Histórico-Artístico el 3 de junio de 1931. En la actualidad pertenece al grupo empresarial Novartis.
English: Plan of Santa María de Retuerta, a monastery located on the left bank of the Douro river, near the town of Sardón de Duero, in the province of Valladolid. It is a monastery which belongs to the premonstratensian order, built in late romanic style and founded by Sancho Ansúrez, count Ansúrez's grandson. Nowadays it is owned by Novartis enterprise.
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{{Information |Description={{es|1=El monasterio de Santa María de Retuerta se encuentra situado en la orilla izquierda del río Duero, cerca de la localidad de Sardón de Duero, en la provincia de Valladolid. Es un monasterio perteneciente a la orden pre