The trittyes (; trittúes), singular trittys (; τριττύς trittús) were part of the organizational structure the divided the population in ancient Attica, and is commonly thought to have been established by the reforms of Cleisthenes in 508 BC. The name trittys means "third", and is named such because there were three types of regions in each trittys. There were thirty trittyes and ten tribes (before Cleisthenes, there were only four tribes organized by royal families) named after local heroes in Attica. Trittyes were composed of one or more demes; demes were the basic unit of division in Attica, which were the smaller units of population that made up the trittyes. (see here - - for a very descriptive map of the demes and tribes). Origin Cleisthenes is credited with this change in the way the Athenians and their surrounding city-states (the area that is referred to as Ancient Attica) were organized. He changed the original four tribes (that were based on family relations) into ten tribes, and formed them in order to represent the male general population as much as possible. This resulted in the formation of each of the 139 demes (subdivisions of smaller city-states) into groups of trittyes. The goal of this new organization was to spread out the areas, make the representation more equal and help them be distributed more evenly. The way that this distribution allowed a more equal spread of representation was that each tribe was composed of their respective trittyes, and each trittyes included areas from the coast (paralia), from the city (asty), and from the inland area (mesogeia). With this organization, one trittys/tribe was not composed of only city, costal or inland areas. The trittys were formed as a way to have fair representation of all the peoples, whereas before the areas were not spread out as evenly or with as much emphasis on equal representation as with these reforms of Cleisthenes. Layout and Background The trittyes were the larger denomination of tribes (Phyle) in Ancient Attica, and were formed by the demes that were near each other. The trittyes were often unequal in size and, with that, representation in the judicial aspects of Ancient Attica. The amount of representation for each trittys ranged from some areas having twenty-seven representatives (such as Coastal Antiochis (tribe)), to some areas having only nine representatives/councilors (such as the city section of Aiantis), with others not having