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
Viridia (gens) that translates as "firm, strong, hardy", and "Tertulla", a diminutive of "Tertia", an old feminine praenomen, which was widely used as a surname throughout Roman history. Viridia (gens) The gens Viridia was an obscure plebeian family at ancient Rome. Members of this gens are known only from inscriptions, evidently dating to imperial times. The nomen "Viridius" seems to be derived from the Latin "viridis", green. Since one of the Viridii left a libationary inscription at Aquae Sulis in Britain, some connection with the obscure British deity Viridios has been suggested, but other Viridii are known from different parts of the