The Royal Palace in Phnom Penh was constructed twice: The first construction took place in 1438. Then the Royal Family moved to Oudong, north of Phnom Penh. The second Palace was built in 1866 and stands to the present day. The Royal Palace compound is 435 meters long by 421 meters wide and a high wall, which is decorated with Seima-shapes, surrounds the complex. It was constructed in 1866-1870 during the reign of His Majesty King Norodom. 

金邊皇宮最先建於1438年，後皇室遷金邊之北而棄用，到1866年重建，就是今天的皇宮，長435米，寛421米，外有城牆，是座典型的高棉式建築，充滿宗教色彩，多為黃白兩色，黃色代表佛教，白色代表婆羅門教，外觀金碧輝煌，氣派不凡。現今皇宮內仍有皇室居住僅部分開放給遊客參觀。

http://en.wikipedia.org/wiki/Royal_Palace,_Phnom_Penh