Hilfield Castle William Coles (1853-1938) local photographer in Watford Hertfordshire. http://www.hertfordshire-genealogy.co.uk/data/postcards/publisher-coles-watford.htm, Hilfield Castle c 1890, als gemeinfrei gekennzeichnet, Details auf Wikimedia Commons

Fort VII Twierdzy Toruń

Margoz, Fort VII Toruń, CC BY-SA 4.0

Limestone Corner (Meilenkastell 30)

Fort de Haesdonck

Néris-les-Bains (Theater) Bertrand Debatty - Sous licence Creative Commons

Westerwood By BJ Smur, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=14268425

Edvin Loach Old Church By Philip Halling, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=12995747

Żagań

Fort de Comboire © Guillaume Piolle / CC BY 3.0, Fort de Comboire vu du Moucherotte, CC BY 3.0

Biel (Ruswil)

Bardo

Laufen (Laufen-Uhwiesen) © History.Travel, Creative Commons Attribution-ShareAlike 3.0

Suone von Clavau © History.Travel, Creative Commons Attribution-ShareAlike 3.0

Leonburg

ManfredK, Lana Leonburg, CC BY-SA 3.0

Hohlandsberg © History.Travel, Creative Commons Attribution-ShareAlike 3.0

Auchencloigh Castle Raymond Okonski, Auchencloigh Castle (Ruin) - geograph.org.uk - 398532, CC BY-SA 2.0

Corongiu Murvonis

Fort Nothe Taken by Steinsky 7 July 2005 17:25 (UTC) at 07:06, Wed 06 July 2005., 050706 005 dorset nothe, CC BY-SA 1.0

Coriano

Jörgenberg (Waltensburg) © History.Travel, Creative Commons Attribution-ShareAlike 3.0

Notre-Dame et Saint-Blaise (Le Breuil)

Antoine Garnier, Le Breuil - Église Notre-Dame-et-Saint-Blaise - 04, CC BY-SA 4.0

Château-Larcher

Jochen Jahnke, F08.Chât.Larcher.0131, CC BY-SA 3.0

Saint-Mansuy

Rauenstein, Fontenoy-le-Château, Eglise Saint-Mansuy1, CC BY-SA 3.0

Portaferry Castle Von Ardfern - Eigenes Werk, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=8809765

Wedlów

Tedesse, Baszta zamku Tuczno, CC BY-SA 3.0 PL

Ruderi del convento

Aumühle (Frauenfeld)

Le Breuil-Benoît

Phaubry, Marcilly-sur-Eure - Abbaye du Breuil, CC BY-SA 3.0

Turin

La Tour Marco Zanoli, Berguen Gemeindehaus, CC BY-SA 2.5

S. Martino (Malvaglia)

Spyridon, San Martino di Tours in Malvaglia, CC BY-SA 4.0

Reifenegg

Harti1977, Burgruine Reifenegg, CC BY-SA 4.0

Burgflue (Twann)

San Lorenzo al Lanzo

Petitverdot: Matteo Vinattieri, Abbazia di San Lorenzo al Lanzo (GR), CC BY 3.0

Renaudie (Saint-Front-la-Rivière)

Père Igor, Saint-Front-la-Rivière ruines la Renaudie (56), CC BY-SA 3.0

Solothurn (Stadt) © History.Travel, Creative Commons Attribution-ShareAlike 3.0

Fresnes (Campigny) Ikmo-ned - Sous licence Creative Commons

Stettiner

Dorota Kowalik, Szczecin zamek4, CC BY 3.0

Barwick-in-Elmet Castle

Pomeroy Wood

Lavello

Graves (Villefranche-de-Rouergue) MOSSOT - Sous licence Creative Commons

Alt Falkenstein (Balsthal)

Claudio Minonzio, Alt-Falkenstein, Südfassade, CC BY-SA 3.0

Offenburger Hof (Augst)

Stockton Hall By Pjn1990 - Own work, CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=7069331

Rogów Opolski

Arturek28 at pl.wikipedia, Rogow Opolski-zamek, CC BY-SA 3.0

Farnell Castle

Penede Copyright Ulrich Moesslang und www.moesslang.net, uli@moesslang.net

Belcastel Krzysztof Golik - Sous licence Creative Commons

Waldburg (Häggenschwil)