Biscuit tile, semi-finished, wall tile tile footage soil find semi-finished ceramic pottery, in form made baked Biscuit tile Baked earthenware without glaze layer Yellow shard slightly scraped earthenware. Semi-finished products from the tile industry archeology Rotterdam Noord Agniesebuurt Schiekade St. Franciscus Gasthuis indigenous pottery tile factory Soil discovery: when working on the Schiekade on the site of the former St. Franciscus Gasthuis, third waste pit.