Unglazed pottery test, round bottom, square top edge, on three legs, fire test test ground find ceramic pottery, hand turned hand shaped baked Square top three legs one standing sausage ear attached between two corners. Red shard. Profile ring on the transition from side wall to bottom. Roetsporen on the inside archeology underground pit Rotterdam City Center Stadsdriehoek Groenendaal indigenous pottery food preparation heating cooking kitchen room Soil discovery: underground pit Groenendaal at 1.90 meters (of Mariniersweg) Approximately 2 meters - NAP found 1975-10-06.