The basic administrative unit in Roman Britain. They were derived from existing British tribes, and were governed by a council drawn from the local landowners, who used a local town (the civitas capital) as their centre of government.
Civitas: The Institute for the Study of Civil Society was launched early in 2000 as an independent think tank. It is a British registered charity (No. 1085494). It is politically non-partisan and is financed by private donations.