Xàtiva is on the margin of a fertile plain, and on the northern slopes of the Monte Vernissa, a hill with two peaks crowned by Xativa Castle. The Collegiate Basilica, dating from 1414, but rebuilt about a century later in the Renaissance style, was formerly a cathedral, and is the chief among many churches and convents. The town-hall and a church on the castle hill are partly constructed of inscribed Roman masonry, and several houses date from the Moorish period.In the 12th century, Xàtiva was known for its schools, education, and learning circles. Islamic scholar Abu Ishaq al-Shatibi's last name refers to Xàtiva where he lived and died. After the Reconquista by Northern Christian kingdoms and the following Christian repopulation, the city became the cradle of one of the most powerful and controversial families of the Renaissance, the House of Borgia, which produced Popes like Callixtus III (Alfonso de Borgia) and Alexander VI (Rodrigo de Borgia).