The imperial palace Neue Burg is the former imperial residence. From 1438 to 1583 and from 1612 to 1806, it was the seat of the kings and emperors of the Holy Roman Empire of the German Nation, thereafter the seat of the Emperor of Austria until 1918. Today it is the official seat of the Austrian Federal President. The oldest sections originate from the 13th century and were primarily constructed by the last of the Babenbergers or by Ottakar II of Bohemia.