The mural was painted in Zagreb's Varšavska Street, at the location of the "Josip Juraj Strossmayer" primary school by the art collective Graffiti na Gradele.
The Polish Embassy said Mošinsky (1843-1907) was chosen as the best link between the two countries, being a grandson of Polish immigrants and a descendant of an old Polish noble family.
Mošinsky, whose contribution to the life of Zagreb is significant, was elected mayor three times successively and served in the period from 1892 to 1904.
His main project was one to divert the Medveščak stream east of the city's central Ban Josip Jelačić Square and close it up. The introduction of a water supply and a sewerage system created preconditions for Zagreb to become a modern city.
During Mošinsky's term a number of squares and public buildings were built, including the Croatian National Theatre, the grand building of the Royal Gymnasium that later became the Mimara Museum, and King Tomislav Square as well as nearby squares which today are known as the Lenuci Horseshoe or the Green Horseshoe, a U-shaped system of city squares with parks in downtown Zagreb.
During Mošinsky's term, a modern city tram service and a taxi service were introduced.
He was the first mayor to ride in a car. During his term, the road linking Zagreb and Mt Medvednica overlooking the city was built, as were the Brestovac sanatorium and a popular hiking rest stop which Zagreb residents named Adolfovac in honour of Mošinsky.
The Polish Embassy also notes that the best proof of his success was the fact that during his mayoral terms the number of Zagreb residents grew by one third in only ten years.