Introduction to the Prince's Palace of Monaco: The Prince`s Palace of Monaco is the official palace of the Prince of Monaco, located in the old town on the promontory. The palace was built in 1191. It was originally a fortress built by the Genoese. Grimaldi became the owner of the castle in 1297. It has been the palace of the royal family for more than 700 years. The long-term renovation and reconstruction make visiting this palace interesting. It's like seeing the political and wealth development history of the royal family over the past 700 years.