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Binh Son Tower, also known as Vinh Khanh Pagoda Tower or Then Tower, is an ancient house, which is said to have originally had 13 floors, but now only 11 floors remain. The tower was built in the Tran dynasty, located in the Vinh Khanh shop (Then temple) in Binh Son village, Tam Son town, Song Lo district, Vinh Phuc province.