Anton Gag (12 June 1859 – 22 May 1908) was a Sudeten-American painter and studio photographer known for his portraits, still lifes, landscapes, and murals.

Immigrating to the United States at the age of 14 with his family in 1873, he later settled in New Ulm, Minnesota, where he spent most of his working life.

Anton Gag (also spelled "Gaag") was born in 1859 as the last of five children in his family in Walk (now Valcha), a hamlet of 15 homes, which is part of today's Stráž in western Bohemia, Austrian Empire (now Czech Republic).

The older man acted as a mentor and patron, commissioning Gag to paint murals in a guest house.

After his return to New Ulm, Gag earned most of his income through his photography studio, especially portraits and the popular cartes de visite.

In 1892 the young widower Gag married Elizabeth (known as Lissi) Biebl of Harrisburg, Pennsylvania, whose family had migrated to Minnesota.

With other local artists Alexander Schwendihger and Christian Heller, he decorated New Ulm's Cathedral of the Holy Trinity, built in 1883 in the German Baroque style.

They created an altar and painted ceiling murals that were similar to traditional church ornament in Bohemia.

The firm of Heller and Gag also performed interior decoration of homes and clubs, painted drop curtains for theatres, and at times employed up to 30 workmen for their many projects.

The house has been preserved and is operated as a museum to tell the story of this family, showing examples of their art and way of life during their residence.

[6] The exterior of the house has been restored to the original colors of the period when the Gag family lived there, including Wanda after her parents died.