Answer Wiki. Wikipedia has a fairly good summary - Modern art - defining it broadly as art from much of the second half of the 19th century through nearly 3/4 of the 20th. There's also a piece on Modernism in the arts from the mid-19th century through the present.
Another major difference that can be seen between Cajun and Creole is in their foods. The food of Creole is Afro-European with some French flair. On the other hand, Cajun foods have a French influence. One can also see that the two sects of people practise and love different music.
Another major difference between Creole and Cajun food is in the type of roux used as the base of sauces, stews, soups, and other savory dishes. Creole roux is made from butter and flour (as in France), while Cajun roux is made from lard or oil and flour. This is partly due to the scarcity of dairy products in some areas of Acadiana (Acadia + Louisiana) when Cajun cuisine was being developed. Gumbo is perhaps the signature dish of both cuisines.