Henrik Gustav Rønneberg Grevenor was born in
Stavanger; the son of Gustav Andreas Michaelsen and Karin Rønneberg. In 1916 he became an assistant at the Antiquities Collection at the
University of Oslo, promoted to amanuensis in 1918. From 1917 he was also at the University's ethnographic museum. He was also a lecturer at the
University of Oslo on the subject of art history. From 1928 he was deputy manager at the
Norwegian Museum of Decorative Arts and Design. His thesis from 1928,
Norsk malerkunst under renessanse og barokk 1550–1700, is regarded a fundamental work in the history of Norwegian art. Among his other works are
Fra laugstiden i Norge from 1924, and monographies of
Jean Heiberg from 1933, and of
Mathias Stoltenberg from 1935. ==Selected works==