in the Cartulary of San Juan de la Peña, between 1020 and 1030 AC. In a document of 1391 it appears cited with the name of Biescas Sobirón. Biescas has always been a town endowed with royal privileges and had two ecclesiastical parishes: San Salvador and San Pedro. Although in the old ages it also had two other temples, the San Torcuato and St. Stephen churches. It is also documented that the hermitage of Santa Elena was reconstructed by King James I in 1253 and endowed with privileges by King Ferdinand in 1484 and King Charles V in 1525. In the sixteenth century, King Philip II ordered to fortify the Santa Elena canyon to protect his kingdoms of possible threats from beyond the Pyrenees. To this end, The Castle of San Pedro was built in neighboring Jaca together with other defenses still visible in the valleys of the Aragon and Gállego rivers. In this context, on 6 and 7 February 1592 eight hundred people from Béarn invaded and occupied Biescas and the Tena Valley for eleven days, before being defeated in the Gorge of Lutherans battle. During the Spanish Civil War (1936-1939) Biescas was almost razed. At the beginning of the conflict the town was quickly conquered by the rebel side and was involved in the Battle of Sabiñánigo, between September and November 1937. In this battle the 43rd and 27th divisions of the army of the Spanish Second Republic launched an offensive against the rebels, specifically against the I brigade of the 51st National Division and local volunteers such as the Valley Tena Panthers. Biescas was recovered by Republican troops at the beginning of the offensive. It is estimated that during the course of the Battle of Sabiñánigo, the total number of deaths (soldiers and civilians) was around 6,000 people. In August 1996, 86 people died due to a flood in Las Nieves camping. Main sights Church of San Salvador. It was built around the year 1200 and was destroyed in the cir of 1936 and later rebuilt. However, the main body of the church still has the original romanesque semicircular apse and chancel. Hermitage of Santa Elena. The current temple was built in the seventeenth century over the River Gallego to the entrance of the Tena Valley, at 5 km from the town center. It stands in the forest with its head built in a cave, next to