Nearly all the tourists who come to southeast France make a tour to Monaco , too. Lying near the French-Italian border, Monaco is not part of France, but a separate principality , though it is surrounded by its greatest neighbour. Monaco became a principality in the 16th century after being owned by a family member of a certain Italian king. The French and Italians, however, soon came to "protect" it one after another, until 1861, when it became its own master again. Facing the blue Mediterranean , Monaco is mainly made up of two cities, Monaco, where the palace of the prince stands, and Monte Carlo , which is a wonderful place for tourists. Every year, around half a million people from all parts of the world come to Monaco, nearly 25 times as much as its population. Believe it or not, Monaco has no soldiers or policemen of its own. Law and order is kept by French police, and French stands for it in its foreign affairs, even the money used in Monaco is franc, too. Monaco has a population of  _  .
over 20, 000 20, 000 or so more than 25, 000 no more than 20, 000