Letter from Philip II of Spain to Pope Gregory XIII, 8th November 1579. Artist: King Philip II

Letter from Philip II of Spain to Pope Gregory XIII, 8th November 1579. Letter written from El Prado by King Philip II of Spain to Pope Gregory XIII, praying him to grant a delay for the payment of a subsidy and to give credence to the Commendador Mayor of Castile in all that he shall say in that behalf. From the fourth series of Facsimiles of royal, historical, literary and other autographs in the Department of Manuscripts, British Museum: Series I - V, (London, 1899). (Photo by The Print Collector/Print Collector/Getty Images)