Clay pipe, unnoticed, from the waste from Rotterdam pipe making, clay pipe smoking equipment smoke floor earthenware ceramic pottery, pressed finished baked Clay pipe unnoticed from the waste from Rotterdam pipe making. brown spot on cauldron on the side of the stem archeology Rotterdam Hillegersberg-Schiebroek Hillegersberg Noord Hillegersberg Zuid Right Rottekade indigenous pottery craft workshop smoking tobacco Hendrick Jansz Soil discovery: Judge Rottekade Rotterdam at number 71 in 1976.