Tianning Temple
The earliest styles of Chinese pagodas were square-base and circular-base, with octagonal-base towers emerging in the 5th–10th centuries. The highest Chinese pagoda from the pre-modern age is the Liaodi Pagoda of Kaiyuan Monastery, Dingxian, Hebei, completed in the year 1055 AD under Emperor Renzong of Song and standing at a total height of 84 m (275 ft). Although it no longer stands, the tallest pre-modern pagoda in Chinese history was the of Chang'an, built by Emperor Yang of Sui. The tallest pre-modern pagoda still standing is the Liaodi Pagoda. In April 2007 a new wooden pagoda Tianning Temple of Changzhou was opened to the public, the tallest in China, standing 154 m (505 ft).