The city of Traianoupoli was founded by the Roman emperor Trajan (r. 98–117) near the ancient town of Doriscus, and received his name. In the Roman period, the city was famous for its baths. The are today ruins of four baths of the Roman and Ottoman period. The Hana is an impressive baths building of the Roman period, renovated by the Ottoman Gazi Evrenos.
The Gravensteen is a castle in Ghent originating from the Middle Ages. The name means 'castle of the counts' in Dutch. Arnulf I (918–965), Count of Flanders, was the first to fortify this place, building a medieval bastion on this high sand dune, naturally protected by the river Leie and its marshy banks. This bastion consisted of a central wooden building and several surrounding buildings, also in wood.
In the early 11th century, the wooden building was replaced by a stone residence, consisting of three large halls that made up three storeys, connected by a stone stairwell. The monumental stone staircase, the light openings, the fireplaces built into the walls and the latrines were signs of considerable luxury and comfort in those days. There was probably also a tower.