Context : Portrait of the Artist's Mother at the Age of 63 (German: Bildnis der Mutter mit 63 Jahren) is a charcoal drawing from March 1514 by the German printmaker and painter Albrecht Dürer, now in the Kupferstichkabinett, Berlin. 
Answer : Kupferstichkabinett, Berlin
What is the name of the place where Portrait of the Artist's Mother at the Age of 63 can be found?