There is no evidence that the early Odrysian kings had a fixed capital. Instead, they probably maintained a mobile court, moving throughout the kingdom and residing in fortified residences. These small fortified places, which the Greeks called "thyrseis", were the backbones of the Thracian aristocracy in a society that did not build towns or cities. This changed somewhat in the late 4th century, when Seuthes III founded Seuthopolis, marking the establishment of early state-like institutions which were probably inspired by those of Hellenistic Macedon. Seuthopolis' size always remained quite small, housing not more than 1.000 inhabitants. It is very likely that it was the home of the kingdom's aristocracy, while the common population continued to live outside the city walls, still practicing the agro-pastoral subsistance economy of old.