Bottom of earthenware beaker from Cologne, Green glazed, cup crockery holder soil find ceramic earthenware glaze lead glaze, hand-turned glazed baked Cup or jug. Yellowish shard covered with lead glaze green Orange brown on the inside. Pivot rail traces on the underside Profile rings around the abdomen just above the foot archeology metropolis Rotterdam City center Stadsdriehoek Oostplein indigenous pottery import drinking beer serving.