Phra Ruang castle hill or palace area Located on the east side of Wat Mahathat. It is the remains of a brick building. Excavated and restored There is a lotus base all around made of stucco. It is assumed that this hill is the location of the royal throne or castle. The residence of the Phra Ruang dynasty kings who ruled Sukhothai in the past. But the castle can't find a good piece anymore. because it must have been built with wood Nowadays, there are only remains of roof tiles scattered everywhere. At this castle hill, the inscription of King Ramkhamhaeng and the Manangkhasila Buddha image were discovered.