A piece of the summit of Kilimanjaro at the New Palace, a swastika in Sanssouci Park, a remnant of the 1893 Chicago World's Fair, the starry ceiling of a villa alluding to the Masonic setting of Mozart's opera The Magic Flute, a spectacular Expressionist tomb, a stone that sings in the heart of the city, a copy of the music pavilion of one of King Louis XV's mistresses, a luminous art installation under a bridge, a carved monkey from the Leaning Tower of Pisa, chimneys replicating those at Hampton Court in London, the esoteric passions of Emperor Frederick William II, a column to commemorate the death of a parrot, a tower to calculate the displacement of the Earth's rotational axis, the last witness to the extraordinary epic of silk production in the Babelsberg district, a woman who disguised herself as a man to fight Napoleon, the spectacular hidden remains of Katharinenholz firing range, the forgotten mock-ups in Zeppelin Park …