Erzerum is a city of eastern Turkey east of Ankara. It was known in the fifth century a.d. as an important Byzantine frontier post with a population of 190,241.

• 埃尔斯伦是土耳其东部城市，位于安卡拉东部。公元15世纪时作为拜占庭帝国的边境贸易站而闻名，有人口190241。