“Le Chat Noir” is one of the most famous pieces of late 19th century European art, but the artist behind it was also very active in France's anarchist and socialist political groups of the time.
Research:

The Life and Afterlife of Casimir Pulaski
45:10

SYMHC Classics: Redpath Murders
32:44

Behind the Scenes Minis: Piece of Work
17:48