Gustav Bartholin Hagen

He completed a mason's apprenticeship in 1894 before attending a technical school to prepare for the Art Academy.

In 1897 he was admitted to the Royal Danish Academy of Fine Arts where he studied under Hack Kampmann among others.

After his return to Denmark, Hagen established a successful practice, specializing in private villas and country houses, including B. Hertz' villa in Vedbæk (1904–08), Lystrupgård at Slangerup (1907) and Broksø at Næstved (1915–16).

He won the competition in 1909 and subsequently made the final design in collaboration with Rolf Schroeder who had taken 3rd prize.

[4] Later in his career, he designed a number of schools, most notably Øregaard Gymnasium (1922–24, with Edvard Thomsen).