Monaco begins

Florestan, the first of his name, prince of Monaco (but not the Andals or the First Men) issued an edict on April 26, 1856, that permitted a pair of developers to begin constructing a “bathing establishment” in his principality. That establishment would eventually become the Monte Carlo casino.

There’s plenty more about Monte Carlo in Roll the Bones: The History of Gambling

Go here to read an excerpt from the book, or learn where to buy your copy.