开封为七朝古都，早在战国时期魏国就在此建有“七仞之城”。在唐代汴州城的基础上历朝各代又修筑城墙多处。古老的开封由外城、内城、宫城组合而成。外城：宋称“罗城”或“新城”，俗称“卧东城”。始建于后周显德年间，为适应当时经济和军事的需要，周世宗于显德二年（公元 Kaifeng as the ancient capital of the seven dynasties, as early as the Warring States Period in this country built “Seven Million City.” On the basis of the Zhuozhou City in the Tang Dynasty, various dynasties also constructed many walls. The ancient Kaifeng by the outer city, inner city, Miyagi combination. The outer city: Song called “Luo city” or “Metro”, commonly known as “lying in the east city.” Was built in the weeks after the show Germany, in order to meet the needs of the economy and military at the time, Zhou Shizong Yu Xiande two years (AD