Several others joined in this administration.[4] After her marriage to Lysimachus ended, Amastris retired to Heraclea, which she governed in her own right. She also founded shortly after 300 BC a city called after her own name Amastris, on the sea-coast of Paphlagonia, by the fusion (synoecism) of the four smaller towns of Sesamus, Cromna, Cytorus and Tium. One of these towns, Tium, later regained its autonomy, but the other three remained part of the city of Amastris' territory.