 In 1908 Almgren became a member of the Royal Swedish Academy of Letters, History and Antiquities, and in 1913 he became Sweden's first professor of Scandinavian and Comparative Archaeology, teaching at Uppsala University.Increasing blindness eventually made the position untenable, and in 1925 Almgren had to leave his post; two years later Sune Lindqvist, a former student, took the professorship.Oscar Almgren's son, Bertil Almgren, was born in 1918, when Oscar Almgren was in his 50s.