[3] He is also known as one of the organizers of some of the first major European art exhibitions in Belgrade, The Italian Portrait Through the Ages, in 1938, and French Painting of the 19th Century one year later.

In order to compile the art collection of the Museum of Prince Pavle, Kašanin traveled through Europe and stayed in the Netherlands, among other places.

His interpretations are based on insights gained by the French research school of the interwar period and are written in a refined style and with a thorough analysis.

[5] After World War II, Kašanin fell out of favor with Yugoslavia's new communist government because of his former close ties with Prince Pavle, and struggled to get a job and publish his books.

His brother Radivoje was an accomplished mathematician and academic, while some of his friends included the fellow art historian Kenneth Clark,[3] and Serbian writers such as Isidora Sekulić, Anica Savić Rebac, and Ivo Andrić.