as a precursor to it. More recently, archaic Greece has come to be studied for its own achievements. With this reassessment of the significance of the archaic period, some scholars have objected to the term archaic because of its connotations in English of being primitive and outdated. No term which has been suggested to replace it has gained widespread currency, however, and the term is still in use. Much evidence about the Classical period of ancient Greece comes from written histories, such as Thucydides's History of the Peloponnesian War. By contrast, no such evidence survives from the archaic period. Surviving contemporary written accounts of life in the period are in the form of poetry. Other written sources from the archaic period include epigraphical evidence, including parts of law codes, inscriptions on votive offerings and epigrams inscribed on tombs. However, none of that evidence is in the quantity for which it survives from the classical period. What is lacking in written evidence is made up for in the rich archaeological evidence from the archaic Greek world. Indeed, although much knowledge of Classical Greek art comes from later Roman copies, all surviving archaic Greek art is original. Other sources for the archaic period are the traditions recorded by later Greek writers such as Herodotus. However, those traditions are not part of any form of history that would be recognised today. Those transmitted by Herodotus were recorded whether or not he believed them to be accurate. Indeed, Herodotus did not even record any dates before 480 BC. Political developments Politically, the archaic period saw the development of the polis (or city-state) as the predominant unit of political organisation. Many cities throughout Greece came under the rule of autocratic leaders, called "tyrants". It also saw the development of law and systems of communal decision-making, with the earliest evidence for law codes and constitutional structures dating to the period. By the end of the archaic period, both the Athenian and Spartan constitutions seem to have developed into their classical forms. Development of the polis The archaic period saw significant urbanisation and the development of the concept of the polis as it was used in Classical Greece. By Solon's time, if not before, the word polis had acquired its classical meaning, and though the emergence of the polis as a political community was still in progress at this point, the polis as an urban centre was