Sao Ronghai is in Chao Mae Takhian Tong Shrine at Wat Sung, Tambon Sao Hai. It is located 500 metres from Sao Hai District Office. It is a large pillar, which is believed to be a female spirit because offerings people give to this pillar are all female items. According to legend, when Bangkok was built as the capital, there was a decree that the most beautiful pillars from all over the country would be taken to Bangkok for selection to find the City Pillar.