before the publication of the first Tridentine 1564, the
Inquisition in Spain had grown particularly aggressive in its
local censorship, publishing its own indexes of prohibited books
at Valencia in 1551 and at Valladolid in 1554 and 1559. Further
editions were printed at Madrid in 1583 and 1612, Seville in
1632, and again at Madrid in 1640 (reprinted in 1667), 1707,
1747, and 1790. Backed by the strict enforcement of the
Inquisition, the Spanish indexes were typically larger and more
restrictive than the Tridentine Index and its derivative Roman
editions, focusing particular attention on vernacular texts.