[nabs-l] Explanation of Paintings--any help?

[Winy Kwany]

Hi all,
I need help. I am learning 20th century music in Music History class. The lecturer asked us to make a slide show presentation about art, fashion and architecture. I tried my best. I could downloat and present the pictures from each of the movement such as cubism, de stijl, etc. The lecturer still blames me, telling me that I should find paintings or buildings with explanation about the pictures. I have told her that I have tried to search for such explanation but I found nothing. I can only find title of the pictures, composer and date of each. She believes that there are such information on the net. Any help? Does anyone know any websites that provide explanation to paintings, architecture and fashion, especially the 20th century ones? 
I look forward to hearing from you very soon. Any help, ideas, input will be highly appreciated. Many thanks.
Winy.