Paromlin Zagreb, Steam mill in Martinovka, Zagreb, Croatia

Paromlin Zagreb is a former steam and flour mill complex in Martinovka, built in two phases between 1862 and 1908. Its mill building, designed by the Hönigsberg & Deutsch studio after the 1906 fire, uses cast-iron columns and steel profiles, while the 1908 silo by engineer Josip Dubsky is among the earliest reinforced-concrete structures in Croatia. The one-storey administrative building from 1895, at the corner of Trnjanska and Koturaška roads, is the only surviving part of the first phase.

The mill was founded in 1863 and operated using steam-powered technology to process grain harvested from nearby farmland. For decades it remained an important part of Zagreb's industrial zone near the main railway station.

The brick walls and large windows speak to the manufacturing work that once happened inside these buildings, giving visitors a sense of how industrial production shaped this part of Zagreb. Today people gather here for events and performances, using the raw industrial architecture as a backdrop for cultural activities.

The complex stands on the block between the main railway station and the Vatroslav Lisinski Concert Hall, at the corner of Trnjanska and Koturaška cesta. The site is a construction zone: the 2013 collapse and the ongoing rebuild into a city library and cultural centre, due for completion in early 2027, keep the buildings closed. View the mill, the 1908 silo and the surviving 1895 administrative building from the surrounding streets.

The reinforced-concrete silo added in 1908 to Josip Dubsky's designs is counted among the earliest uses of reinforced concrete anywhere, and the first known such structure in Croatia. The mill and transmission buildings used cast-iron columns and steel profiles. The complex collapsed in 2013, prompting rescue work.