Sokolnicheskaya line

The Sokolnicheskaya line (Russian: Соко́льническая ли́ния, IPA:pronunciation, formerly Kirovsko-Frunzenskaya (Ки́ровско-Фру́нзенская) (Line 1; Red Line) is a line of the Moscow Metro in Moscow, Russia. It opened in 1935 and is the oldest line of the Moscow Metro system. There are currently 27 stations open on the line. As of 2024, the line is 47 kilometres (29 mi) long and is the longest line in the Moscow Metro.