the late Roman period, the 4th and 5th centuries AD. It was not exported to other regions. Central Gaulish samian ware The principal Central Gaulish samian potteries were situated at Lezoux and Les Martres-de-Veyre, not far from Clermont-Ferrand in the Auvergne. Production had already begun at Lezoux in the Augustan period (Augustus, reg. 27 BC–AD 14), but it was not until the reign of Trajan (AD 98–117), and the beginning of a decline in the South Gaulish export trade, that Central Gaulish samian ware became important outside its own region. Though it never achieved the extensive geographical distribution of the South Gaulish factories, in the provinces of Gaul and Britain, it was by far the most common type of fine tableware, plain and decorated, in use during the 2nd century AD. The quality of the ware and the slip is usually excellent, and some of the products of Les Martres-de-Veyre, in particular, are outstanding, with a lustrous slip and a very hard, dense body. The surface colour tends towards a more orange-red hue than the typical South Gaulish slips. Vessel-forms that had been made in South Gaul continued to be produced, though as the decades passed, they evolved and changed with the normal shifts of fashion, and some new shapes were created, such as the plain bowl with a horizontal flange below the rim, Dr.38. Mortaria, food-preparation bowls with a gritted interior surface, were also made in Central Gaulish samian fabric in the second half of the 2nd century (Dr.45). There is a small sub-class of Central Gaulish samian ware with a glossy black slip, though the dividing line between black terra sigillata and other fine black-gloss wares, which were also manufactured in the area, is sometimes hazy. When a vessel is a classic samian form and decorated in relief in the style of a known samian potter, but finished with black slip rather than a red one, it may be classed as black samian. Though the Central Gaulish forms continued and built upon the South Gaulish traditions, the decoration of the principal decorated forms, Dr.30 and Dr.37, was distinctive. New human and animal figure-types appeared, generally modelled with greater realism and sophistication than those of La Graufesenque and other South Gaulish centres. Figure-types and decorative details have been classified, and can often be linked to specific workshops Lezoux wares also included vases decorated with barbotine relief, with appliqué motifs,