One of the UNESCO World Heritage Site's is a royal palace originally developed by who?
Sights and landmarks of Seville: There are numerous sights and landmarks of Seville. Sights and landmarks of Seville:  The most important sights are the Alcázar, the Seville Cathedral, and the "Archivo General de Indias" (General Archive of the Indies), which are UNESCO World Heritage Sites. Alcázar of Seville: The Alcázar of Seville (Spanish "Reales Alcázares de Sevilla" or "Royal Alcazars of Seville", (] )) is a royal palace in Seville, Andalusia, Spain, originally developed by Moorish Muslim kings.
Moorish Muslim kings