The Imperial Castle, also known as Nuremberg Castle, is a historic fortress located in Nuremberg, Germany. It served as a residence for the Holy Roman Emperors and is one of the most important medieval fortifications in Europe. The castle complex includes several buildings, towers, and walls, showcasing various architectural styles from different periods. Visitors can explore the castle's impressive structures, such as the Sinwell Tower and the Imperial Palace. The site offers panoramic views of the city and houses a museum that highlights the castle's history and significance in the context of the Holy Roman Empire.