1962 – She earned her Ph.D. in the history of art at Bryn Mawr College.
1970 – She taught at a number of schools, including Bryn Mawr, Swarthmore College and New York University, and was director of the International Study Center of the Museum of Modern Art before joining the Yale faculty.
1974 – She was appointed chairman, the title she preferred of the Department of the History of Art.
– The first woman to be hired as a full professor at Yale.
1977 – Her book "Manet and the Modern Tradition" received the prestigious Morey Award for Scholarship in the History of Art.
1978 – She was named as the John Hay Whitney Professor in the History of Art.
1980 – She researched, wrote and lectured on Futurism, an avant-garde aesthetic movement that flourished in the early 20th century.
1985-1987 – Professor Hanson was acting director of the Yale University Art Gallery.
1990 – The list of honors Professor Hanson garnered throughout her long career include the Distinguished Teacher of Art History Award from the College Art Association of America, a Distinguished Alumna Award from the University of North Carolina and a Kress Professorship at the National Gallery in Washington, D.C.
1995 – She was the acting curator of European and contemporary art.
2004 – She died on September 1st.