The Sultanate of Singora was a heavily fortified port city in southern Thailand and precursor of the present-day town of Songkhla. It was founded in the early 17th century by a Persian, Dato Mogol, and flourished during the reign of his son, Sultan Sulaiman Shah. In 1680, after decades of conflict, the city was destroyed and abandoned; remains include forts, city walls, a Dutch cemetery and the tomb of Sultan Sulaiman Shah. An inscribed cannon from Singora bearing the seal of Sultan Sulaiman Shah is displayed next to the flagpole at the Royal Hospital Chelsea, London.