"12. Jahrhundert" "12th century" "16. Jahrhundert" "16th century" Alemanha Alemania Allemagne Architecture Architektur Bruchsteinbau Building Burg Castle "Defence tower" "Defence work" Deutschland Donjon Duitsland Dungeon Eckquader Europa Europe Fort Fortification "Fortified tower" Fortress "Fotified tower" "Freiherren von Knigge" "Frühe Neuzeit" Germany Harkerode Harz "Harz mountains" Höhenburg Keep "Mansfelder Land" "Medieval tower" "Middle Ages" "Military building" Mittelalter Palas Ruin Ruine Sachsen "Sachsen-Anhalt" Sajonia "Sajonia-Anhalt" Saksen "Saksen-Anhalt" Saksonia "Saksonia-Anhalt" "Saksonya eyaleti" Sasko "Sasko-Anhaltsko" Sassonia "Sassonia-Anhalt" "Saxe historique" "Saxe-Anhalt" "Saxonia-Anhalt" Saxony "Staircase tower" Stronghold Treppenturm Tyskland Unterharz Wehrbau Westeuropa Wohnturm