The
Arbatsko–Pokrovskaya Line (, ) (
Line 3) is one of the lines of the
Moscow Metro. Chronologically the second to open, it connects the district of Mitino and the town of
Krasnogorsk to the northwest of Moscow with the eastern suburbs of the Russian capital passing through the city centre. There are 22 stations on the line, which is long, making it the longest line of the system.