Tag 'subject:wikipedia = de:Preußischer optischer Telegraf'

Value histogram for key 'wikimedia_commons'

• 1: Category:Prussian optical Telegraph Station 1 Alte Berliner Sternwarte
• 1: Category:Prussian optical Telegraph Station 4 Potsdam Telegraphenberg
• 1: Category:Prussian optical Telegraph Station 2 Berlin-Dahlem

---

Quelle / Ursprung dieser Information: OpenStreetmap