Construction of the Da Yan Pagoda began in 652. Construction of the Giant Wild Goose Pagoda in Chang'an (modern Xi'an, Tang Dynasty China, is completed in this year during the reign of Emperor Gaozong of Tang. This pagoda was 64 m in height, and was built to store the translations of Buddhist sutras obtained from India by the Xuan Zang. In 707, construction of the Xiao Yan Pagoda, Little Wild Goose Pagoda) began, and measured 45 m tall at the time of completion. An earthquake in 1556 damaged the tower and reduced its height to 43.4 m. Built during the Tang Dynasty it originally had five stories, although the structure was rebuilt in 704 during the reign of Empress Wu Zetian and its exterior brick facade renovated during the Ming Dynasty.