Abbey of San Pedro de Siresa

Buildings have existed at this site for centuries, possibly back to Visigothic times according to the excavations conducted in 1991.

In 852, the traveling monk and scholar Eulogius of Córdoba wrote Guilesino of Pamplona about the splendor of the monastery and its library.

Eulogius found and copied Greco-Roman manuscripts there which had been lost in his home Caliphate of Cordoba, including an Aeneid, Latin poetry of Horace and Juvenal, fables by Aviano and The City of God by Augustine of Hippo.

A donation completed in 864 granted the monastery all the valley lands between Javierregay (now the town of Puente la Reina de Jaca) to the site of Water Eye, in the Pyrenees, which includes the Subordán Aragon river, today in the municipality of Anso.

Tenth century grants and confirmations of property document the monastery's importance and use of income to acquire new lands.

The front door and facade form a massive structure, the exterior of which features a pair of arches, and a small bell.