Newcastle Castle is a historic fortress located in Newcastle upon Tyne, England. It was built in the 12th century and served as a royal castle and military stronghold. The castle complex includes the Castle Keep, which is the oldest part, and the Black Gate, which served as the main entrance. Today, Newcastle Castle is a popular tourist attraction, offering visitors a glimpse into the region's medieval history. The site features exhibitions and guided tours, allowing guests to explore its impressive architecture and learn about its significance in the development of Newcastle and the surrounding area.