Explores the usage of the term “Moor” within premodern Christian Iberian discourses, with primary reference to 13th century Castile. The essay argues that “Moor” was advanced as an identifier by Iberian Christians in order to draw a homogenizing distinction between a purportedly unified Christian Iberian populace and a body politic of “foreign” Muslims: both those living outside of Castile and within it. The work engages conversations in the study of premodern Iberia, identity, and erasure.