Wine glasses made of terracotta from Cappadocia, created by artist Mehmet Körükcü. The glass has been polished with a piece of iron; polishing technique used by craftsmen of the Urartu civilization (11,000-9,000) to make pottery harder and shinier before the use of glaze was discovered and then fired in a wood-fired oven. The Red River (the Kızılırmak), which is also Turkey's longest river, has provided many generations of artisans with the red clay used to create their iconic art. Pottery was produced in this region as early as 2000 BC, the time of the Hittites. Set of 4 wine glasses.