Courtesy of Wikipedia, some history about the fall of Granada:
On January 2, 1492, the last Muslim sultan in Iberia, Emir Muhammad XII, known as Boabdil to the Spanish, surrendered complete control of Emirate of Granada, to Ferdinand II and Isabella I, Los Reyes CatÃ³licos (‘The Catholic Monarchs’), after the last battle of the Granada War.
I’ve completed a detailed textual analysis of all references to Tom Bombadil in the Fellowship of the Ring and consulted supplementary texts such as The Adventures of Tom Bombadil (reprinted in The Tolkien Reader) and I’ve concluded that Bombadil is indeed Boabdil. The implications of this upon the subtext of the entire trilogy (and especially the reinterpretation of the prequel, the Hobbit) cannot be overstated.
It’s no accident that later that same year, Columbus – aka Celebrimbor – sailed into the West.