The Legions of Marshal Józef Piłsudski Bridge (Polish: Most im.

The bridge was constructed as part of a new railway line from Kutno to Sierpce and Brodnica needed to fill a gap in the infrastructure of the newly independent Second Polish Republic left after the period the partitions of Poland where in the russian controlled Congress Poland the occupiers limited the construction of railways on the left bank of the Vistula river for strategic reasons, and create a rail link from Lwów through Skarżysko, Łódź and Brodnica to the Baltic Sea linking the envisioned future Central Industrial Region with the port of Gdynia.

A tender for the construction of the bridge was held in 1936, won two companies, "Konstanty Rudzki i Spółka" and "Przedsiębiorstwo Robót Inżynieryjnych – Leszek Muszyński", which started work on the bridge from both ends by 1937 and finished in 1938 in a record 20 months.

The project faced unique engineering challenges due to the high escarpment on the right bank of the river in Płock, which was solved by having the bridge rise 8 meters from the bridgehead located on the flat left bank and each span individually designed.

Following the German invasion of Poland at the beginning of World War 2, the bridge was blown up by the retreating Polish Army in September 1939.