The Spaniards were committed, by Royal decree, to convert their New World indigenous subjects to Catholicism. However, often initial efforts were questionably successful, as the indigenous people added Catholicism into their longstanding traditional ceremonies and beliefs. The many native expressions, forms, practices, and items of art could be considered idolatry and prohibited or destroyed by Spanish missionaries, military and civilians. This included religious items, sculptures and jewelry made of gold or silver, which were melted down before shipment to Spain.