The most impressive building of the main station was then built in the very centre of the complex, in addition to which a freight warehouse, a locomotive shed hall with a fan-shaped room for four steam locomotives with a turntable, a water station and residential buildings for railway officials were built at the site.
Before World War I, a water tower, a night shelter and a second fan hall, located west of the older one, were built in the locomotive shed.
In the years 1914–1918, in the area adjacent to the locomotive shed, a road viaduct was built over the railway line, spatially enclosing the station on the western side.
In the 1940s, a large-scale expansion of the station in Gniezno was undertaken, which included the construction of: 14 new positions in the western fan hall with a ventilation chimney in the locomotive shed; central heating boiler room (with a special track for transporting coal); combustion power plant with switchgear and transformer station; locomotive control room (designed individually for Gniezno); material and oil storage in the wagon house; a technical line for steam locomotives with coal fences and cranes; wagon workshops; mechanical workshops; and a crane hall.
[3] In the post-war period, investments included the construction of a staff social building with an instruction room in the 1960s (clearly different architecturally) and the adaptation of part of the fan hall to operate electric locomotives.
The resistance of the local community and conservationists and the lack of funds for this purpose prevented the destruction of the technical heritage in the locomotive depot.
The tourist route includes a passage among the most important buildings of the complex, as well as the entrance to the fan hall, where a historical exhibition has been arranged.