Isaac Grünewald (1889–1946) was a prominent Swedish-Jewish painter and one of the most significant figures in Swedish modernist art. Born in Stockholm, he studied at the Royal Swedish Academy of Arts and further honed his skills in Paris under Henri Matisse, a leading figure in Fauvism. This training deeply influenced his style, which was characterized by bold colors, expressive brushwork, and a strong sense of form.

Grünewald played a crucial role in introducing modernist art to Sweden, often facing criticism from conservative art circles. His work ranged from portraits and landscapes to large-scale decorative murals. Notable works include his monumental stage designs and murals for theaters and public buildings in Sweden.