苏颂
When presenting his clocktower design to the Emperor Zhezong, Su Song equated the constant flow of water with the continuous movements of the heavens, the latter of which symbolized the unceasing power of the emperor. This appealed to the emperor, who featured artwork representing the clocktower on vehicles of major imperial processions, as illustrated in the "Illustration of the Imperial Grand Carriage Procession" of 1053.