Pius Weloński (1849-1931) was a Polish sculptor and painter. Between 1868 and 1872 he studied at the Drawing School in Warsaw, where his teachers included: Konstanty Hegel (sculpture) and Rafał Hadziewicz (painting). From 1872 to 1878 he studied at the Imperial Academy of Fine Arts in St Petersburg (thanks to a scholarship from the Society for the Encouragement of Fine Arts), from which he graduated with a gold medal. Between 1878 and 1883 he stayed in Italy, and later still in France and Germany. In 1897, he returned to Warsaw, where he was given a studio at the Warsaw Castle after Bolesław Syrewicz. In 1901, he opened a casting factory. From 1904 to 1915 he was professor and director of the Drawing School in Warsaw (he taught modelling), and from 1906 he was honorary director of the Warsaw Museum of Fine Arts.

He was also: a correspondent member of the Kraków Academy of Skills, an honorary professor of the Academy of Fine Arts in St. Petersburg, and from 1924 also the director of the private Wojciech Gerson School of Fine Arts in Warsaw.