What is the fine-grained topic of the following text: Built in 1804 during the reign of King Anourouth and ideally located at the top of Mount Phousi (in the heart of the town), Wat That Chomsi has become a symbol of Luang Prabang’s spiritual significance to Laos. Only return the topic.
Wat That Chomsi in Luang Prabang, Laos