 After Haarlem lost the Siege of Haarlem in 1573, it became a Catholic enclave that officially fell under the rule of Philip II of Spain.It wasn't until 1577 that the local bishop Godfried van Mierlo set his seal to the "Satisfactie van Haarlem" wherein he promised to swear allegiance to Willem the Silent rather than Philip II, on the condition that the Catholics would keep the same rights as Protestants.Though Haarlem, like Amsterdam with its "Alteratie", reverted the Catholic rights of this "Satisfactie" a year later, it was this special Catholic-friendly reputation that attracted many from the south that added to the city's wealth in its golden age.