Grandiose building projects were supported by the government, including the erection of towering Buddhist Chinese pagodas and the construction of enormous bridges (wood or stone, trestle or segmental arch bridge). Many of the pagoda towers built during the Song period were erected at heights that exceeded ten stories. Some of the most famous are the Iron Pagoda built in 1049 during the Northern Song and the Liuhe Pagoda built in 1165 during the Southern Song, although there were many others. The tallest is the Liaodi Pagoda of Hebei built in 1055, towering in total height. Some of the bridges reached lengths of , with many being wide enough to allow two lanes of cart traffic simultaneously over a waterway or ravine. The government also oversaw construction of their own administrative offices, palace apartments, city fortifications, ancestral temples, and Buddhist temples.