Roman-Germanic settlement frequented starting from 100 A.D. to 260 A.D. In this place, small families of Germans extracted and produced raw materials for the nearby city of Cologne and they were guarded by a Roman garrison.
While the Germans lived in scattered wooden huts, the Romans probably resided in a building with a tiled roof as evidenced by archaeological findings.
http://archiv.bgv-rhein-berg.de/node/8394
This place is indicated by the greek geographer Ptolemy as "Alisum" but should not be confused with the Augustan military camp of Aliso on the Lippe river.