The Imperial Castle in Poznań, popularly called Zamek was constructed under the German rule in 1910 by Franz Schwechten for William II, German Emperor, with significant input from William himself. Since its completion, the building has housed government offices of Germany (to 1918 and during the Second World War) and Poland (1918–1939, 1945–present).
The name of this structure is misleading, as the building is a palace rather than a castle. Another difference arises from the adjective imperial (cesarski) preferred by the Poles and royal (königliches) used by the Germans. The German name refers to William II as King of Prussia, in this function he built the palace as his provincial residence, while the Polish name refers to him as Emperor of Germany because the term "royal" is reserved for Poznań's Royal Castle, home to the early medieval Kings of Poland.
Grand Theatre, Poznań (Polish: Teatr Wielki im. Stanisława Moniuszki w Poznaniu) is a neoclassical opera house located in Poznań, Poland. It is named after famous Polish composer Stanisław Moniuszko. Designed by German architect Max Littmann, and inaugurated in 1910 with The Magic Flute (Wolfgang Amadeus Mozart), the Grand Theatre in Poznań is a main opera stage in Greater Poland Voivodeship currently directed by Michał Znaniecki.