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
Aquae Albae in Byzacena Aquae Albae in Byzacena Aquae Albae in Byzacena (also typographed Aquæ Albæ in Byzacena) was an Ancient city and bishopric in Roman Africa and remains a Latin Catholic titular see. Its present location is Ain-Beida, in modern Tunisia (which has namesakes, notably in Algeria and Morocco). Aquae Albae was important enough in the Roman province of Byzacena to become one of the many suffragans of its capital Hadrumetum's Metropolitan Archbishop, but was to fade. The diocese was nominally restored in 1933 as a Latin Catholic titular bishopric. It has had the following incumbents, all of the lowest (episcopal) rank :