The Stadt Schloss in Berlin, the main residence of the Kaisers when they came to the throne, was totally destroyed by the Communists in 1953. It had been severally damaged during WWII, but salvagable; nonetheless, the Russians leveled it in order to destroy any symbol of Prussian power.
Today, plans are nearly approved to rebuild the palace with exterior details as they had been originally planned and built. The inside will be a museum.
In its day, this palace was considered one of the, if not the, best example of baroque palaces in Europe. Its interior main staircase was the most grand, and the White Room was an unusual (for the time) decor of all white marble, alabaster, porcelain, and hints of gold.