Monaco is a sovereign city state on the French Riviera. It is bordered on three sides by its neighbour, France, and its centre is about 16 km from Italy.. Its area is 1.98 km2 with a population of 35,986 as of 2011 and is the most densely populated country in the world. Monaco is a principality governed under a form of constitutional monarchy, with Prince Albert II as head of state. The House of Grimaldi has ruled Monaco, with brief interruptions, since 1297. The state's sovereignty was officially recognized by the Franco-Monegasque Treaty of 1861. Despite Monaco being independent and pursuing its own foreign policy course, its national defence is the responsibility of France. Citizens of Monaco are called Monacans, while Monegasque is the proper term for describing someone who was born in Monaco. I was lucky enough to visit and spend a great time in Monaco, it's really beautiful place.