Camulodunum pavements. It may have reached a population of 30,000 at its height. It was not until the late 18th century that historians realised that Colchester's physical Brythonic (British Celtic) and Roman remains were the city mentioned in ancient literature as "Camulodunum". The earliest Iron Age defensive site at Colchester is the Pitchbury Ramparts earthwork north of the town between West Bergholt and Great Horkesley. The main earthwork defences of the Brythonic Celtic oppidum of "Camulodunon" were built later, beginning in the 1st century BC but most date from the 1st century AD. They are considered the most extensive of their
ISO basic Latin alphabet on the already published "American Standard Code for Information Interchange", better known as ASCII, which included in the character set the 26 × 2 letters of the English alphabet. Later standards issued by the ISO, for example ISO/IEC 8859 (8-bit character encoding) and ISO/IEC 10646 (Unicode Latin), have continued to define the 26 × 2 letters of the English alphabet as the basic Latin script with extensions to handle other letters in other languages. The Unicode block that contains the alphabet is called "C0 Controls and Basic Latin". In Unicode 7.0 two subheadings exist: The letters are also contained in