The author of the Warsaw Mermaid sculpture at the Old Town Market Square is Konstanty Hegel. Hegel, a sculptor from Warsaw, created this monument in 1855 on behalf of the city council, as part of the project for the first modern water supply system in Warsaw designed by Henryk Marconi.

The Warsaw Mermaid at the Old Town Market Square is one of the most recognizable symbols of Warsaw. The Mermaid is depicted as half-woman, half-fish, holding a sword in one hand and a shield in the other. The sculpture was made by Konstanty Hegel in 1855 and has since stood guard over the city, symbolizing its spirit and determination.

Legend has it that the Mermaid saved Warsaw from danger, making her the guardian and patroness of the city. She is not only an important element of local history but also an inspiration for residents and tourists visiting the capital.