Adalbertus Aloysius Kalkstein (d. 1272) was a master alchemist, author, occasional armorer and honorary chairman of the Alchemists, Geomancers, and Pyromancers Club, rivaling the Oxenfurt Inventors' Club. While in Vizima, he owned a house in the nonhuman district of the Temple Quarter, right next door to Golan Vivaldi and just around the corner from Shani. At some point, after a turmoil caused by the Order of the Flaming Rose and Scoia'tael, he moved into Novigrad where he lived his ordinary life until he was captured by the witch hunter and subsequently burned at the stake.