The Martyrs of Cordoba
The martyrdoms at Cordoba in the mid-ninth century were chronicled by Eulogius of Cordoba, a priest of the city who was himself martyred in 859 and who composed the Memoriale sanctorum and related writings to record and defend the martyrs. His account is the principal contemporary source for the episode, though it does not preserve a detailed narrative for every individual named among the martyrs.
Many of those executed in this period deliberately sought martyrdom, professing Christ openly or denouncing Islam in public and thereby incurring the death penalty under the law of the Emirate. The episode took place against the background of a Christian community living under Muslim rule, and the surviving sources differ in the amount of detail they preserve for each martyr, Sandalus among the more obscure.