Coal of a permanent brazier of coal on the altar of Minerva at Aquae Sulis (modern day Bath), although in fact easily accessible surface coal from what became the Somerset coalfield was in common use in quite lowly dwellings locally. Evidence of coal's use for iron-working in the city during the Roman period has been found. In Eschweiler, Rhineland, deposits of bituminous coal were used by the Romans for the smelting of iron ore. No evidence exists of the product being of great importance in Britain before about AD 1000, the High Middle Ages. Mineral coal came to be referred to
Cardiff Roman Fort Cardiff Roman Fort Cardiff Roman Fort was a coastal fort in the Roman province of Britannia Superior, of which Roman Wales was a part. Its original Latin name is uncertain. Its remains are incorporated into Cardiff Castle in the modern capital city of Wales. The fort's name is uncertain. It could have been Tamium as appears in the Ravenna Cosmography, although this may have been a river name and thus refers to the River Taff. Alternatively it may be Bovium (corrected from Bomio) of the Antonine Itinerary. Prior to the building of the extant fort, there were at least two