Robert Engels (9 March 1866, Solingen - 24 May 1926, Munich) was a German painter, illustrator, lithographer, designer, and art teacher.
He was trained to take over the family business, but had little interest in it so, after his father's death in 1885, he left it to his younger siblings and enrolled at the Kunstakademie Düsseldorf, where he studied until 1889.
Following his graduation, he made some lengthy stays in France, Belgium and England; eventually deciding to settle in Düsseldorf, where he became a regular contributor to the magazine Jugend.
He maintained contact with the artists' colony at Schondorf, received commissions from the Krupp family, designed church windows in Breslau and did scenographic work for theatres in Munich and Leipzig; all of which is documented in personal papers left by Gustava.
In 1934, she donated large parts of his artistic estate to the newly-created Robert Engels Memorial Foundation; funded by the city of Solingen.