Patan Durbar Square is an ancient palace complex located in the city of Patan, which is also known as Lalitpur, in the Kathmandu Valley of Nepal. The square is a UNESCO World Heritage Site and is one of the three durbar squares in the valley, the other two being Kathmandu Durbar Square and Bhaktapur Durbar Square.

The complex was built during the reign of the Malla dynasty, which ruled over the Kathmandu Valley from the 12th to the 18th centuries. It served as the royal palace and center of administration for the Malla kings. The complex includes numerous temples, palaces, courtyards, and shrines, many of which date back to the 17th and 18th centuries.

Some of the major attractions within the square include the Golden Temple, which is dedicated to the Hindu goddess Taleju Bhawani, the Krishna Temple, which is known for its intricate carvings and metalwork, and the Patan Museum, which displays artifacts and art from the Malla period. Other notable structures within the complex include the Sundari Chowk, which is a courtyard surrounded by intricate carvings, and the Mul Chowk, which is the oldest part of the palace complex and was built in the 16th century.

The Patan Durbar Square suffered significant damage during the 2015 earthquake that struck Nepal, but many of the structures have been restored since then. The complex is an important cultural and historical site in Nepal and attracts numerous tourists and pilgrims every year.