Celeia is an ancient Roman city located in present-day Slovenia. It was founded in the 1st century BC and served as an important trade and cultural center in the region. The city was known for its strategic position along trade routes, which facilitated commerce and interaction between different cultures. Today, the archaeological site of Celeia features remnants of Roman architecture, including walls, streets, and public buildings. Visitors can explore the ruins and learn about the city's history, which reflects the influence of both Roman and local cultures during its peak.