Period of Artwork that has changed the world in some way? when has art changed s

Question:

Period of Artwork that has changed the world in some way? when has art changed society!?

Okay, so i'm going a project for a philosophy of art class and i'm looking for a period of artwork, or a piece of artwork that has directly influeced history. for example, a type of art that has lead to some revolutionary change, or something even small for that matter and im having a tough time, any suggestions

Best Answer - Chosen by Asker:

michealangelo, leonardo da vinci during the renaissonce