Wat Phra Mahathat lies in the ancient city of Sankhaburi. It was the former royal temple of Mueang Phraek or Mueang San named after its King. The temple houses a distinguished prang with a fluted spire like the shape of a star fruit. The prang, housing Buddha relics, is made from brick on a square shaped plinth in Lopburi style. Other structures in brick include a well-preserved viharn. The size of the complex indicates how important this temple was.