Clock Tower is a monument built in one mission of Emperor: Rise of the Middle Kingdom.
During the Song Dynasty, China went through a technological boom and invented many things that still exist to this day. The Clock Tower was an invention used to create the calender and tell the time and was considered to be an astronomical invention by Chinese standards.
True to its roots, the Clock Tower is only buildable when the player returns to Kaifeng. It requires Stone, Wood and Steel, all of which must be imported from trade partners. The monument honours Shen Nong and Zao Jun.