《南齐书·本纪·卷七》
世祖兴光楼上用青漆，世人称之 青楼 ，皇上还说： 武帝还不算聪明能干，为什么不全都用上琉璃。 
世祖兴光楼上施青漆，世谓之 青楼 。帝曰： 武帝不巧，何不纯用琉璃。 
Shizu used blue paint on the Xingguang Tower, and people called it the “Blue Tower”. The emperor also said: “Emperor Wu is not considered to have been very clever or capable, why didn’t he use glazed tiles all over it?”