Romano-British town across from St. Albans, Hertfordshire, England. Before the Roman conquest, Verulamium was the capital of Tasciovanus, prince of the Catuvellauni; under Roman rule it soon was made a municipium. Destroyed by Boudicca (or Boadicea; queen of the Iceni) in 60-61 AD, it soon regained its prosperity. Among its ruins are the city grid plan, the forum, a theater associated with a temple of Romano-Celtic type, a market hall, two triumphal arches, fragments of the town wall, and many well-appointed houses with fine mosaics and wall paintings. It was still of some importance when it was visited by St. Germanus in 429, but thereafter was replaced by St. Albans. It is thought to be the third largest Roman town in Britain.