- (“Half Tower”, remnants), Kühlbergturm (“Kühlberg Tower”, remnants),
Sonnenturm (“Sun Tower”, remnants),
Hutturm (“Hat Tower”),
Zollturm (no
longer existing)...
- Observatory, Sunspot, New Mexico,
United States United
States Göttinger
Sonnenturm (Solar
Tower Telescope) 2x15 cm 11 cm 1942–2004 Göttingen,
Germany Germany...