Inter caetera
Inter caetera ('Among other [works]') was a papal bull issued by Pope Alexander VI on 4 May 1493, which granted to the Catholic Monarchs King Ferdinand II of Aragon and Queen Isabella I of Castile all lands to the "west and south" of a pole-to-pole line 100 leagues west and south of any of the islands of the Azores or the Cape Verde islands. It remains unclear whether the pope intended a "donation" of sovereignty or an infeudation or investiture.