After the expulsion of the Islamic rulers during the Reconquista, considerable Muslim populations, and Christian craftsmen trained in Muslim styles, remained in Spain, and Mudéjar is the term for work in art and architecture produced by such people. The Mudéjar Architecture of Aragon is recognised as a UNESCO World Heritage site, and the 14th century "Patio de las Doncellas" built for Peter of Castile in the Alcázar of Seville is another outstanding example. The style could harmonize well with Christian European medieval and Renaissance styles, for example in elaborate wood and stucco ceilings, and Mudéjar work often continued to be produced for some centuries after an area passed to Christian rule.