Wincenty Zaleski (1873-1942) was a pharmacist and the family was active in the Polish Charity Society. During the Second World War, Zaleski, together with his son and daughter, was active in the Union of Armed Struggle in Dyneburg. From February 1942, this organisation was active in the structures of the Home Army. At the end of 1942, the Germans discovered the Polish underground organisation in Dyneburg and arrested 20 people, including the Zaleski family. Zaleski died in prison on 10.12.1942.

The grave of Wincenty Zaleski has a concrete frame and a metal cross with a small plaque with the inscription: "ŚP/ WINCENTY ZALESKI/ UR. 18.06.1873/DIED.10.12 1942".

In 2002, plaques were placed on the graves of distinguished Poles resting in Dyneburg, funded by the Council for the Protection of Remembrance of Struggle and Martyrdom. The inscription on the plaque then placed on the grave of Wincenty Zaleski reads: "WINCENTY / ZALESKI / 1873 - 1942/ PROVISOR, SOCIAL ACTIVIST, / SOLDIERS OF THE UAW, MURDERED / BY THE HITLEROWS".