The Tomb of Khải Định, officially Ứng Mausoleum, is located in Chau Chu mountain near Huế in Vietnam. It was built for Khải Định, the twelfth Emperor of the Nguyễn dynasty. It was built from 1920 to 1931 taking 11 years to complete. The tomb is a blend of Western and Eastern architecture. It is located on a steep hill outside of the capital city of Huế.