One of Spain’s most intriguing monuments is the royal monastery church of San Isidore in Léon. It is well known for its extensive cycles of capitals, its Romanesque portals, and above all the paintings in the so-called Pantheon de los Reyes at the west end of the church. Previous scholars have usually held the Infanta Urraca (d. 1101), sister of King Alfonso VI, responsible for the rebuilding of the church, or have considered the Infanta...