Arsène Lupin is an ingenious French criminal mastermind and "gentlemen thief".
In the early 20th century, Lupin was approached by aeronaut Jean Robur into joining Les Hommes Mystérieux, and becoming its second member at Robur's suggestion. Thus becoming a counterpart to the English burglar A.J. Raffles of Mina Murray's second League.
Arsène Lupin was created by Maurice Leblanc and appeared in a number of stories and twenty novels and short story collections from 1905 to 1939. Lupin is the "Prince of Thieves," the archetypal Gentleman Thief of popular culture.