The Schloss Tegel or Humboldt-Schloss is a country house in Tegel, part of the Reinickendorf district of the German capital Berlin. The brothers Wilhelm and Alexander von Humboldt spent much of their childhood in a former schloss on the site and on the estate, which extends almost as far as Lake Tegel.
The present building was built between 1820 and 1824 by Wilhelm von Humboldt to designs by Karl Friedrich Schinkel. It still belongs to the Heinz family, descendants of Wilhelm. It houses the private Humboldt-Museum, open to guided tours during the summer.
Wikipedia https://en.wikipedia.org/wiki/Schloss_Tegel
Coordinates 52°35'42.307" N 13°16'34.758" E
