Patan Durbar Square is situated at the centre of the city of Lalitpur in Nepal. It is one of the three Durbar Squares in the Kathmandu Valley, all of which are UNESCO World Heritage Sites. One of its attraction is the ancient royal palace where the Malla Kings of Lalitpur resided. The Malla Kings did make important changes to the square. Most of the current architecture is from the 1600s, constructed during the reign of King Siddhinarasimha Malla and his son Srinivasa sukriti. Some of the notable Mallas Kings who improved the square include Purandarasimha, Sivasimha Malla and Yoganarendra Malla.