Directions:

Braunschweig was the city where Giesel, in his radium production at Buchler Chininfrabrik (Buchler Quinine Works), also co-discovered actinium.
Map 2 gives the present site for this company, in a suburb north of Braunschweig, where the original monument of the Buchler company has been moved.
Map 3 is the original site of the Buchler company in central Braunschweig