 The development of Greek and Roman urbanization is relatively well-known, as there are relatively many written sources, and there has been much attention to the subject, since the Romans and Greeks are generally regarded as the main ancestors of modern Western culture.It should not be forgotten, though, that the Etruscans had many considerable towns and there were also other cultures with more or less urban settlements in Europe, primarily of Celtic origin.The amphitheatre was, with the triumphal arch and basilica, the only major new type of building developed by the Romans.