Il laboratorio di Kalkstein is where we find nostro alchimista preferito in Vizima Antica in Capitolo V of The Witcher. The neighbourhood has definitely gone downhill. Here, cemetauri e graveir regularly congregate in the alley just outside Kalkstein's door.
His accommodations there are much more modest than even his casa nel Quartiere del Tempio. As with his other home, Kalkstein is generous with his space here too and allows the witcher to stay here anytime in Capitolo V.