Camulodunum is the Roman name for the ancient settlement which is today's Colchester, a town in Essex, England. Camulodunum is claimed to be the oldest town in Britain as recorded by the Romans, existing as a Celtic settlement before the Roman conquest, when it became the first Roman town, and eventually a settlement of discharged Roman soldiers, known as Colonia Claudia Victricensis. There is archaeological evidence of settlement 3,000 years ago. Its Celtic name was "Camulodunon", meaning "the Fortress of Camulos" (Camulos being a British god equated with the Roman Mars). This name was modified to the Roman spelling of "Camulodunum".
Read more about Camulodunum: Prehistoric Era, Early Roman Camulodunum, Roman Town