Chinese prefectural government officials travel to Chang'an…

Chinese prefectural government officials travel to Chang'an in 643 to give the annual report of the affairs in their districts.

Emperor Taizong discovers that many have no proper quarters to rest in, and are renting rooms with merchants.

Therefore, Taizong orders the government agencies in charge of municipal construction to build every visiting official his own private mansion in the capital.

In this year also, Taizong commissions artist Yan Liben to paint in the Lingyan Pavilion the life-size portraits of 24 government officials to commemorate their service and contributions to the founding of the Tang Dynasty.