Cambodia Angkor Wat is the largest religious monument in the world. The last temple known to have been constructed in Angkor Thom was Mangalartha, which was dedicated in 1295. Thereafter the existing structures continued to be modified from time to time, but any new creations were in perishable materials and have not survived. Towards the end of the 12th century, Angkor Wat gradually transformed from a Hindu centre of worship to Buddhism, which continues to the present day. Angkor Wat was largely neglected after the 16th century.