and a class usually referred to as 'cut-glass' decoration, with geometric patterns cut into the surface of the vessel before slipping and firing. Two standard 'plain' types made in considerable numbers in Central Gaul also included barbotine decoration, Dr.35 and 36, a matching cup and dish with a curved horizontal rim embellished with a stylised scroll of leaves in relief. During the second half of the 2nd century, some Lezoux workshops making relief-decorated bowls, above all that of Cinnamus, dominated the market with their large production. The wares of Cinnamus, Paternus, Divixtus, Doeccus, Advocisus, Albucius and some others often included large, easily legible name-stamps incorporated into the decoration, clearly acting as brand-names or advertisements. Though these vessels were very competently made, they are heavy and somewhat coarse in form and finish compared with earlier Gaulish samian ware. From the end of the 2nd century, the export of sigillata from Central Gaul rapidly, perhaps even abruptly, ceased. Pottery production continued, but in the 3rd century, it reverted to being a local industry. East Gaulish samian ware There were numerous potteries manufacturing terra sigillata in East Gaul, which included Alsace, the Saarland, and the Rhine and Mosel regions, but while the samian pottery from Luxeuil, La Madeleine, Chémery-Faulquemont, Lavoye, Remagen, Sinzig, Blickweiler and other sites is of interest and importance mainly to specialists, two sources stand out because their wares are often found outside their own immediate areas, namely Rheinzabern, near Speyer, and Trier. The Trier potteries evidently began to make samian vessels around the beginning of the 2nd century AD, and were still active until the middle of the 3rd century. The styles and the potters have been divided by scholars into two main phases, Werkstatten I and II. Some of the later mould-made Dr.37 bowls are of very poor quality, with crude decoration and careless finishing. The Rheinzabern kilns and their products have been studied since Wilhelm Ludowici (1855–1929) began to excavate there in 1901, and to publish his results in a series of detailed reports. Rheinzabern produced both decorated and plain forms for around a century from the middle of the 2nd century. Some of the Dr.37 bowls, for example those with the workshop stamp of Ianus, bear comparison with Central Gaulish products of the same date: others are less successful. But the real strength of the Rheinzabern industry lay in its extensive production of good-quality samian cups, beakers,