《水经注·卷十六》
南宫建成后，明帝叫侍中京兆韦诞用古篆来题字。迁都洛阳后，才叫中书舍人沈含馨用隶书来题字；景明、正始年间的。《尔雅》说：楼观称为网。《说文》说：网，就是门口的楼观。
《风俗通》曰：鲁昭公设两观于门，是谓之阙，从门，欮声，《尔雅》曰：观谓之阙。《说文》曰：阙，门观也。
After the construction of Nangong, Emperor Ming asked the Imperial Attendant Wei Dan from Jingzhao to inscribe it in ancient seal script. After the capital was moved to Luoyang, the Secretary of the Central Secretariat Shen Hanxin was called upon to inscribe it in clerical script; during the years of Jingming and Zhengshi. The Erya says: "A tower and a pavilion are called wang." The Shuowen says: "Wang is the tower and pavilion at the entrance of a gate."