《资治通鉴·唐纪·唐纪十四》
太宗营造玉华宫，命令务必节俭，只将居住的殿宇用瓦覆盖，其余均用茅茨压顶；然而太子宫、百官衙署要设置齐全，满山遍野的建筑，耗费银两巨大，可以亿计。
上营玉华宫，务令俭约，惟所居殿覆以瓦，馀皆茅茨；然备设太子宫、百司，苞山络野，所费已巨亿计。
Taizong built Yuhua Palace and ordered it to be frugal. He only used tiles to cover the top of the palace where he lived. The others were all covered with thatch. However, the crown prince’s palace and the offices of various officials should be complete. The construction across the mountains and plains was lavish and could cost a hundred million taels of silver.