A piece of clay that has been fired to make it hard. Pottery is made in kilns for a variety of purposes. Prehistoric pottery is usually very soft, since it was fired in bonfires with no control over the firing, (compare with a kiln). Samian ware is a special type of pottery - it is a tableware, one that was put on the table to display food. Some types of pottery were produced in the northeast - from Roman period White Wares (COR WW) made at Corbridge to Post-Medieval and Modern times on Tyneside and Wearside. Designs that change often are useful for dating a layer by comparisons to elsewhere.