Fragment of earthenware chamber pot on pinched stand, wide neck opening, glazed, pot holder sanitary soil find ceramic earthenware glaze lead glaze, hand-turned glazed fired Fragment of earthenware chamber pot on pinched stand ring Wide neck opening Outstanding top edge. Convex shape with low belly Fully lacerated Single profile ring around the shoulder. Typical lime scale on the inside archeology underground pit Rotterdam City Triangle Blaak Groenendaal indigenous pottery drains night sleeping room hygiene Soil discovery Groenendaal underground pit to Blaakstation.