Aquincum was an ancient Roman city located in present-day Budapest, Hungary. It served as the capital of the Roman province of Pannonia and was established around the 1st century AD. The site features well-preserved ruins, including a military amphitheater, baths, and residential buildings, showcasing the daily life of its inhabitants. Today, Aquincum is an important archaeological site and museum, attracting visitors interested in Roman history. The remains provide valuable insights into Roman urban planning, architecture, and culture, making it a significant location for both historians and tourists alike.