Philip IV´s sister, Maria, was born in El Escorial in 1606. As a result of her royal lineage, she was destined to become yet another pawn in the play of matrimonial alliances that the European courts found so useful. As a marriageable infanta, marrying her was first considered a means of improving diplomatic relations with England, but those efforts failed as a result of religious incompatabilites. A few years later, she became engaged to her cousin, Ferdinand Habsburg, then king of Hungary and later Emperor of Austria.