Located in the center of Liaocheng ancient city, Guangyue Building is the symbol of Liaocheng, a water city in the north of the Yangtze River. In the second year of Hongwu in Ming Dynasty, Chen Yong, commander of Dongchang garrison, converted the earthen city built by Song Xining in three years into a brick city, and in the seventh year of Hongwu, a drum tower with a height of 100 feet was built by using the residual wood in the city, so it was originally named "Yumulou" and later named "Dongchang Building" because of the land. It was not until the ninth year of Hongzhi in Ming Dynasty that Li Zan, a foreign official passing by Dongchang, named it Guang Yue Lou. He said in "Preface to the Poems of Guangyuelou": "The first floor in the city is tall and majestic, and the heavenly seal climbed it more than once until it was absolutely out of the pavilion. Looking up and looking down, it was creepy. Because of sighing at this building, there is nothing in the world ... Tianzhu judged it as' Guangyue Building', which is closer to Shandong and brighter than Daiyue. " Since then, it has been called Guangyue Building. At that time, the purpose of building this building was to "be strict and leak more, observe the enemy's situation from a distance, and report the time to the police." With the consolidation of the Ming dynasty, the military function of this building was soon forgotten, but it was famous for its majestic height. Guangyue Building is a masterpiece of the transition from Song and Yuan architecture to Ming and Qing architecture, which occupies an important position in the history of ancient architecture in China. On 1988, Guangyuelou was listed as a national key cultural relics protection unit.