Berlin’s Royal Palace has been through various incarnations, with the latest, Humboldt Forum, slated to open in 2019 at the earliest. The palace was the main center of Hohenzollern power for several centuries, until Kaiser Wilhelm II abdicated toward the end of World War I. Partly destroyed in World War II, it was pulled down by the GDR, who built a Palast der Republik. This was torn down after reunification, and the Senate voted to partly rebuild the Prussian version and install a slew of cultural and educational institutions. Until the Humboldt Forum opens, visit the Humboldt Box, a space that offers a detailed story of the original palace, a wonderful scale model of the area around 1900, and a café-restaurant and viewing platform on the top floor.