Sigisbert Chrétien Bosch Reitz, known as Gijs (1860-1938) was a Dutch painter in the Impressionist and Symbolist styles.

After briefly attending the Quellinusschool, in Amsterdam, he went to Munich,[1] where he took various drawing and painting courses, then finished his training at the Académie Julian in Paris, under the direction of William-Adolphe Bouguereau.

Between each move, he travelled; to France, the United States and Japan, where he made a detailed study of Japanese art.

[2] He produced relatively few paintings because he worked slowly, paid great attention to detail and often strove hard to achieve a tapestry-like effect.

Richard Roland Holst and Ferdinand Hart Nibbrig were good friends, but he generally remained aloof from the other artists at Laren and their social or professional affairs.