Mitte is the first and most central borough of Berlin. The borough consists of six sub-entities: Mitte proper, Gesundbrunnen, Hansaviertel, Moabit, Tiergarten and Wedding. It is one of the two boroughs (beside Friedrichshain-Kreuzberg) which comprises former West and East Berlin districts. Mitte encompasses Berlin's historic core and includes some of the most important tourist sites of Berlin like Museum Island, the TV tower, Checkpoint Charlie, Brandenburg Gate, Unter den Linden, Potsdamer Platz, Alexanderplatz, the Reichstag and Berlin Hauptbahnhof, most of which were in former East Berlin. When Berliners refer to Mitte they usually mean the smaller locality rather than the larger borough.