Can anyone give me a list of 20th century artifacts or cultural exhibits?

Question:

Can anyone give me a list of 20th century artifacts or cultural exhibits?

This is for research for my novel. Artifacts and cultural exhibits like you would find in world-renowed museums here and abroad. A good list would be around 10, with some background information, or a link to list them would be great. I've asked a similar question to this in August about 25 artists and their paintings. (I'm not sure what category this would fit under.)

Best Answer - Chosen by Asker:

I could give you a list, but here's a better reference:

http://www.si.edu/

The Smithsonian Institution would be one of THE websites looking for 20th century artifacts.

Good luck!