Askeran fortress (Azerbaijani: Əsgəran qalası, also called Mayraberd in Armenian), is a fortress in the town of Askeran in Azerbaijan (de jure), in the Armenian-controlled Nagorno-Karabakh Republic (de facto). It is on the banks of the Qarqar River and was built by the Karabakh khanate ruler Panah Ali Khan[3] and consists of two sections. The left-bank section features a double line of stone walls.