Columbia University [Students drawing a nude in an art class.]

Columbia University [Students drawing a nude in an art class.]

Columbia University [Students drawing a nude in an art class.]

Columbia University [Students drawing a nude model in an art class.]

Columbia University [Students drawing a nude in art class.]

Columbia University [Students drawing a nude in art class.]

Columbia University [Students drawing a nude in art class.]

Columbia University [Students drawing a nude in art class.]

Columbia University [Students drawing a nude in art class.]

Columbia University [Students drawing a nude in art class.]

Columbia University [Students drawing a nude in art class.]

Columbia University [Students drawing a nude in art class.]

Columbia University [Professor teaching a class in a lecture hall.]

Columbia University [Professor teaching a class.]

Columbia University [Professor teaching a class.]

Columbia University [Professor teaching a class.]

Columbia University [Professor teaching a class.]

Columbia University [Professor teaching a class.]

Columbia University [Professor teaching a class.]

Columbia University [Professor teaching a class.]