The popularity of Books of Hours in Latin encouraged translations into vernacular languages throughout Europe. In Spain, however, the ecclesiastical authorities were especially conservative, and the Index of Prohibited Books published at Valladolid in 1559 specifically banned Books of Hours in Spanish. As a result, only foreign printers could make such editions available and these could only be used outside of Spain.
BRB1276. Las Horas de nuestra Señora segun el uso Romano. Lyon: [Pierre Fradin] for the heirs of Jacobo Junty, 1560.
“BRB1276,” Bridwell Library Special Collections Exhibitions, accessed October 2, 2022, https://bridwell.omeka.net/items/show/1649.