Background
He was born in Stavanger. The son of Gustav Andreas Michaelsen and Karin Rønneberg.
He was born in Stavanger. The son of Gustav Andreas Michaelsen and Karin Rønneberg.
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 orther works are Fra laugstiden i Norge from 1924, and monographies of Jean Heiberg from 1933, and of Mathias Stoltenberg from 1935.