may 3, 1804 - Proclaimed himself emperor

Description:

With full popular support behind him, Napoleon proclaimed himself emperor of the French in May 1804. On December 2, 1804, in a coronation ceremony, he himself placed the imperial crown on his head, a dramatic gesture demonstrating his self-reliance and independence. However, he had not yet reached his zenith, which was still three years away.

Added to timeline:

Date: