Constructed in the eleventh century and currently located in the Museum of San Isidoro in León, Spain, the Reliquary Casket of Saints John the Baptist and Pelayo reflects a time of religious and social change in the Kingdom of León. Featuring twenty five finely decorated ivory plaques, the casket demonstrates the exchange of craft and material across political borders. Like artistic motifs, the relics of saints were exchanged, displaying the shifting powers in medieval Iberia.