氢原子百科 
西四区，是北京市已撤销的市辖区，成立于1952年，由北京市第四区和第五区部分合并而成，位于今北京市区西部。[1][2][3]因区内有西四牌楼（简称西四）而得名。[4][5][6]1958年，西四区被撤销，与西单区合并为西城区。[7][8]
正文
简介
1958年撤销，与西单区合并为西城区。
参考资料 8
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