English: The Thap Duong Long is a three tower Cham Hindu monuments complex in Tây Sơn district of Bình Định province, Vietnam. The site is much larger than the surviving towers, with excavations revealing the original complex to include a mandapa and other structures. The brick tower temples (kalan) were originally dedicated to the Hindu trinity – Brahma, Vishnu and Shiva, as is evidenced by the artwork found at the site.

Each tower temple has a square plan, follow the Vijaya style of Hindu architecture vertically and are capped with a ring of amalakas at the top. The Thap Duong Long is from the 12th century.

The site, like numerous Buddhist and Hindu sites in Vietnam were badly damaged during the Vietnam war. It was restored in the 2010s, though plants and tree tend to rapidly grow in between the bricks.

This site should not be confused with Dong Duong Cham temple site in Quang Nam province. The Thap Duong Long complex is notable for comparative studies with the 12th century Chien Dam triple tower Hindu temples complex south of Da Nang, as they offer a comparison of the Vijaya and the Amaravati style of Champa architecture.