Knyaginya Maria Luiza Metro Station (Bulgarian: Метростанция „Княгиня Мария Луиза“) is the 21st station to open on the Sofia Metro in Bulgaria. It is situated near the road junction Nadezhda in the northern part of Sofia, at the intersection of Maria Luiza Boulevard and Gen. Stoletov Blvd. It was put into operation on August 31, 2012 and is also known as the fifth station on the second BLUE line of the metro (station 5-II). It was also the first station on the path of the TBM, which worked on the section between stations 5-II and 9-II (part of phase I of the metro extension project), entirely constructed by the Turkish company Doğuş Construction, part of Doğuş Holding. The station is a shallow triple-span station with two rows of concrete and steel columns. It serves two central tracks and