宇文恺（公元555～612年）姓宇文，名恺，宁安乐，祖上是鲜卑人，宇文恺出身于贵族世家，他的哥哥字文沉在北周被封为把国公。宇文化因为是功臣之子，三岁场爵双义伯，七岁晋封为安平郡公。但是宇文倍和他的几个哥哥不同，不喜武而好文，读了许多书，特别爱钻研有关建筑方面的 Yuwen Kai (555 ~ 612 AD) surnamed Yu, Ming Kai, Ning Anle, the ancestor is the Xianbei, Yuwen Kai was born in a noble family, his brother Shen Shen in the Northern Zhou Dynasty was sealed as the national. Yu culture because it is the hero of the son of three-year-old market double-Yi Bo, seven-year-old seal Anping County public. However, Yuwen times and his few brothers different, do not like martial arts and good writing, read a lot of books, in particular, love to study the construction aspects