Why did Emperor Taizong continue to build Zhaoling after his death?

Zhaoling is the joint tomb of Emperor Taizong and Empress Wende. It is located on Jiuyang Mountain, 22.5 kilometers northwest of Liquan County, Shaanxi Province.

From the first burial of Empress Wende in the tenth year of Zhenguan in Tang Dynasty (636) to the 29th year of Kaiyuan (743), the construction of Zhaoling took 65,438+007, with a circumference of 60 kilometers and an area of 200 square kilometers, with more than 65,438+080 tombs. It is the "Eighteen Tombs of Tang Dynasty" in Guanzhong, and it is also the largest and largest royal cemetery in China. It is a representative imperial mausoleum in the Tang Dynasty, and is known as "the famous mausoleum in the world".