Royal Monastery of Santa María de Sigena () is a convent in Villanueva de Sigena, region of Aragon, Spain. Built between 1183 and 1208, the Romanesque church was founded by Queen Sancha of Castile, wife of Alfonso II of Aragon. The General Archive of the Crown of Aragon, the official repository of royal documentation of the Crown since the reign of Alfonso II (12th century), was located in this monastery until the year 1301. The convent church is based on the shape of the Latin cross. It has a single nave, a wide transept and three apse chapels. There are also elements from Cistercian and Mudéjar architecture such as in the roofs and windows. The main entrance portal features fourteen archivolts. History The convent was operated by the Order of Saint John of Jerusalem. It flourished in the 14th century thanks to royal support but declined after the crown of Aragon merged with Castile. Several royal burials were made in the convent church, including Sancha of Castile, Queen of Aragon, who lived out her last years and died there after being marginalized by her son Pedro II of Aragon, who is also interred there along with two of his sisters. In 1835, after the Ecclesiastical Confiscations of Mendizábal deprived it of most of its revenues, the convent was abandoned by its religious community, although some nuns later returned. The Romanesque convent was largely destroyed by fire in 1936 by anti-clerical Anarchist militiamen in the Spanish Civil War. Restoration of the convent began in the 1950s. The Romanesque cloister was restored in 1974. Artworks still in place include the royal tombs of Sancha and Peter of Castile, while the former abbess' throne was moved to the Lleida Museum. In 1985 nuns from the Sisterhood of Bethlehem took over the convent. Major artworks The church contains royal tombs of the House of Aragon. The Romanesque cloister, once in ruins, owes its current appearance to a 1974 reconstruction. Artworks still in place include the royal tombs of Sancha and Peter of Castile, while the former abbess' throne is in the Diocesan and Comarcal Museum of Lleida. The chapter house housed extremely important Romanesque frescos of about 1200 by largely English artists, probably including some of those who produced the Winchester Bible; this was only realized after their destruction. The artists also appear to have visited Palermo before Sigena, as some influence from mosaics