Editing Pope Adrian I (section)

===Muslim Spain===

Regarding the Muslims, he maintained the prohibition of [[Pope Zachary]] of selling slaves to Muslims, whom Adrian described as "the unspeakable race of [[Saracens]],"<ref>{{cite book|author1=Robin Blackburn|title=The Making of New World Slavery: From the Baroque to the Modern, 1492–1800|date=1998|publisher=Verso|isbn=9781859841952|page=43|edition=illustrated, reprint}}</ref> in order to guarantee a labor pool and to keep the power of Muslim rivals in check.<ref>{{cite book|author1=John Victor Tolan|author2=Gilles Veinstein|author3=Henry Laurens|title=Europe and the Islamic World: A History|date=2013|publisher=Princeton University Press|isbn=9780691147055|page=83|edition=illustrated}}</ref> He also encouraged Charlemagne to lead his troops into Spain against the Muslims there,<ref>{{cite book|author1=Alex Roberto Hybel|title=Ideology in World Politics|date=13 May 2013|publisher=Routledge|isbn=9781134012503|page=30}}</ref> and was generally interested in expanding Christian influence and eliminating Muslim control.<ref>{{cite book|author1=Karolyn Kinane|author2=Michael A. Ryan|title=End of Days: Essays on the Apocalypse from Antiquity to Modernity|date=9 Apr 2009|publisher=McFarland|isbn=9780786453597|page=51}}</ref>

The rise in the number of Christian girls being married to Muslims in [[al-Andalus]] prompted a letter of concern from Adrian.{{sfn|Barton|2015|p=21}} Adrian's response was due to dispatches from bishop Egila, who had been tasked with preaching the gospel in the peninsula.{{sfn|Barton|2015|p=21}} Egila eventually fell in with the [[Migetians]], a rigorist sect, provoking Adrian's condemnation.{{sfn|Cavadini|1988|p=32}}