Berlin's most famous opera house, Staatsoper unter den Linden is one of the most spectacular and impressive opera houses in Europe. This neo-classical building on Unter den Linden was designed in the early 18th Century by Knobelsdorff, King Friedrich II's architect. Interestingly, it was the first major German theater not to have been attached to a palace. The State Opera House has been redeveloped several times over the centuries, but its beauty and wonderful performances remain the same.