The "Prince of Qi" refers to a historical title held by members of the royal family in the ancient Chinese state of Qi. This state was one of the major powers during the Warring States period, which lasted from the 5th century to 221 BC. The title was often associated with political and military leadership, as well as cultural patronage. The most notable figure known as the "Prince of Qi" is Xiang Yu, who played a significant role in the power struggles following the fall of the Qin Dynasty. His leadership and military strategies were influential during this tumultuous time in Chinese history, contributing to the eventual establishment of the Han Dynasty.