History: The official language of Monaco is French, with Italian and English also widely used; the currency is the euro. The Grimaldi family has been closely linked with Monaco's history since the end of the 13th century, and the Prince's Palace is still the head of state's residence; the changing of the guard at noon each day is open to the public. The Oceanographic Museum was founded by Prince Albert I and is linked to the tradition of marine research; the Monte Carlo Casino, built in the 19th century, is one of the symbols of the principality's shift from military fortress to tourism and services. The Monaco Grand Prix circuit uses city streets, and during the race each year transport and accommodation across the whole city tighten sharply.
Legend: A legend about the principality's origins is widely told: in 1297, François Grimaldi disguised himself as a monk, tricked the city gate open and seized the fortress. This is a later, widely circulated legendary version, the details are to be verified, and it should not be taken as literal history.