Excavating in the Round Tower at Fort Snelling in preparation for restoration, 1965. Photographed by Terry Garvey.

Interior of the Round Tower Museum, 1941.

Round Tower postcard, c.1910.

Round Tower postcard, c.1905.

Oil painting of round tower by moonlight, c.1888.

Clement Haupers giving a lecture on the St. Croix river and displaying his paintings of the St. Croix area in the Livingston-Griggs Amusement Room, c.1969.

Clement Haupers in his studio, 1975.

Clement Haupers in his studio, c.1930.

Clement Haupers clowning around, c.1931.

Clement Haupers, 1979. Photographed by Elizabeth M. Hall.