Bebelplatz - Berlin
Once called Opera Square. You can see the twice-bombed Staatsoper (one of the best opera houses in the world), St Hedwig’s Cathedral, a Catholic cathedral built in Protestant Berlin by Frederick the Great. You can hear his FULL story by heading to Potsdam, the former state bank of East Germany, the Law Faculty of the Humboldt University (the old Royal Library). Over two dozen Nobel prize winners studied here, Marx and Engels worked here, the Brothers Grimm studied here and Einstein taught here.