The Mariánské Lázně trolleybus system forms part of the public transport network in Mariánské Lázně, in the Czech Republic. The spa town located in the western part of the Czech Republic is one of the smallest towns in the world that still has an operating trolleybus system. It was established as a replacement for older no longer adequate tram system and went into operation on 27 April 1952, when Mariánské Lázně was in Czechoslovakia. The very first vehicles to operate the newly established network were Škoda 7Tr. Since 2006 the public transport in Mariánské Lázně is operated by Městská Doprava Mariánské Lázně s. r. o. company. The new trolleybus system not only connected railway station with the city centre, which a tram line trolleybuses replaced did as well, but also extended the operation to other town areas. Over the years the reach of the network extended practically to all directions connecting all major parts of the town. At its peak size, the system served the following terminus stations: "Antoníčkův pramen", "Panská pole", "Goethovo náměstí", "City Service", "Velká Hleďsebe" and "Lesní pramen". However, the service to Lesní pramen was suspended from 1979 to 1986 and then finally ended in 1996. The remaining trolleybus wires in this section were removed in 2012. Trolleybus lines in operation There are currently 4 trolleybus lines in operation in Mariánské Lázně. Lines 6 and 7 require hybrid (currently diesel/electric) trolleybuses to service small parts of the network not-equipped with overhead wires. Post Velvet Revolution history Since the fall of the communism in 1989 the system had to deal with under-maintenance and a few attempts to close the system. Thanks to two waves of last-minute support, first in 2004-2006 and the second one since 2017 lasting up until now, the system persisted up until today. Late 90s and early 2000s Since the second half of 1990s the town's council tried to get rid of the trolleybus network claiming high maintenance costs. The fact the network was under-maintained and the vehicles were old did not make the situation any better. However, thanks to strong citizen reactions against the removal of such network it was finally decided to purchase new trolleybuses. In between the years 2004 and 2006 seven new Škoda 24tr vehicles were purchased, partially using EU funds. One of the Škoda 24Tr vehicles was a prototype and started its service in 2004 after which all the other