Meanwhile, at home, the Muslim manuscripts had been either burnt or taken to other countries. Jews had also been expelled from Spain. Some Jews remained but they had to become Christians. Among the few old things kept and respected in Spain were in music: harmony and stringed instruments. The buildings that had been built by the Moors were kept, and many Muslim religious buildings (mosques) were turned into churches. Some Jewish religious buildings were also turned into churches. Many Arab words became part of the Spanish Language.