Building Foundation No. 4 of the Erlitou site is located in the eastern palace-area,straight ahead of Palace-foundation No. 2. Its main part was excavated from the spring of 2002 to the spring of 2003. These remains consist of the rammed-earth platform of the main pavilion and the vestiges of the eastern corridor, with the former occupying an area of over 460 sq m. Judging from the discovered vestiges, the fourth foundation can be reconstructed to represent a building complex formed of the main pavilion, the eastern and western corridors and the yard between them. These buildings were constructed in the third phase of Erlitou culture, roughly simultaneously with the complex represented by Foundation 2. The two compounds shared the same central axis and must have belonged to the same building group.
