Decline of the Byzantine Empire of its territory in Asia Minor, and was in immediate danger of complete annihilation. It recovered following the Komnenian restoration, as Alexios I Komnenos restored relations with the Papacy, and requested aid against the Turks from Pope Urban II at the Council of Piacenza in 1095. Later that same year, the pope preached the First Crusade at the Council of Clermont. In the wake of the success of the First Crusade, the three competent Komnenian emperors, especially Manuel I Komnenos (r. 1143–1180), may have had the power to expel the outnumbered Seljuks, several factors combined to ensure that they never
Pope Pius II was not an eminent scholar. His Latin was fluent, but he knew little Greek. Still, his writings have many good qualities. Pope Pius II inaugurated an unusual urban project, perhaps the first city planning exercise in modern Europe. He refurbished his home town of Corsignano (province of Siena, Tuscany) and renamed it Pienza, after himself. A cathedral and palaces were built in the best style of the day to decorate the city. They survive to this day. Pope Pius II Pope Pius II (, ), born Enea Silvio Bartolomeo Piccolomini (; 18 October 1405 – 14 August 1464) was Pope