The Abbey of Saint-Savin-en-Lavedan was a Benedictine abbey in the commune of Saint-Savin and one of the most important religious centres in the County of Bigorre. The abbey dates at least from the 10th century, and it was built by order of Charlemagne on the site of an ancient Gallo-Roman fortress. In 841, the abbey was looted and burnt by the Normans, and previously by the Saracens.
In 945, Count Raymond I of Bigorre gave the abbey a generous endowment consisting of a territory known as the Pascal de Saint-Savin, which was made of the eight villages. The church of Saint-Jean-de-Saint-Savin became their communal church.
In 1080 the abbey was united to the Abbey of St. Victor, Marseille. In 1130 Bernard d'Arcizas and Centule II, Count of Bigorre, confronted the abbot and the inhabitants of the Val d'Azun over a burial. Queen Marguerite of Navarre (1492–1549) took refuge in the abbey from a flood. From the thirteenth century, the abbey still controlled the territory of seven villages.
From the 16th century the abbey suffered due to the destruction associated with the French Wars of Religion and relaxed its discipline, although there were attempts to restore it in the 17th century by the monks of the Congregation of St. Maur.
Only three monks remained living in the abbey in 1790. In the following year, the church and the monastic buildings were converted for the use of the parish. Part of the abbey was sold for a stone quarry and the chapter house became a stable. In 1854, a strong earthquake caused further destructions. Prosper Mérimée took charge of its restoration in 1855.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.