 | Castello di San VigilioOrt · Bergamo | unbekannt | CC BY-SA 3.0 | Original ↗ |
 | Castello di TorregalliOrt · Florenz | sailko | CC BY-SA 3.0 | Original ↗ |
 | Castello di TorrenovaOrt · Rom | Livioandronico2013 | CC BY-SA 4.0 | Original ↗ |
 | Castello EurialoOrt · Syrakus | Giovanni Dall'Orto | Attribution | Original ↗ |
 | Castello MackenzieOrt · Genua | Twice25 & Rinina25 | CC BY 2.5 | Original ↗ |
 | Castello ManiaceOrt · Syrakus | User: Stevage | CC BY 2.5 | Original ↗ |
 | Castello Montorio VeronaOrt · Verona | Syrio | CC BY-SA 4.0 | Original ↗ |
 | Castello SforzescoOrt · Mailand | Carlo Dell'Orto | CC BY-SA 4.0 | Original ↗ |
 | Castello SonninoOrt · Florenz | Ebonaiuti | CC BY-SA 4.0 | Original ↗ |
 | Castello SonninoOrt · Livorno | Marcxosm | CC BY-SA 4.0 | Original ↗ |
 | Castello Svevo Di BariOrt · Bari | Genesis5663 | CC BY-SA 4.0 | Original ↗ |
 | Castello TramontanoOrt · Matera | Mateola | CC BY-SA 3.0 | Original ↗ |
 | Castello TürckeOrt · Genua | patano | CC BY-SA 3.0 | Original ↗ |
 | Castello UrsinoOrt · Catania | Maurizio Moro5153 | CC BY-SA 4.0 | Original ↗ |
 | Castello UtveggioOrt · Palermo | Hszeee at Italian Wikipedia | CC BY-SA 3.0 | Original ↗ |
 | Castello Visconteo di MacconagoOrt · Mailand | Ysogo | CC BY-SA 4.0 | Original ↗ |
 | Castellum on ReckbergOrt · Düsseldorf | Johannes1024 | CC BY-SA 3.0 | Original ↗ |
 | Castelnau HousingOrt · Montreal | Alexcaban | CC BY 3.0 | Original ↗ |
 | Castel NuovoOrt · Neapel | unbekannt | CC BY-SA 2.5 | Original ↗ |
 | Castelo da Rocha ForteOrt · Santiago | File:Castelo Rocha Forte.webm by Enmacosa | CC BY-SA 4.0 | Original ↗ |
 | Castelo de San SebastiánOrt · Vigo | Unknown authorUnknown author | Public domain | Original ↗ |
 | Castelo de Santo AntónOrt · A Coruña | Álvaro Pérez Vilariño | CC BY-SA 2.0 | Original ↗ |
 | Castelo de São JorgeOrt · Lissabon | unbekannt | CC BY-SA 2.0 | Original ↗ |
| Castelo de S.Jorge, LisboaOrt · Lissabon | unbekannt | CC BY-SA 2.0 | Original ↗ |
 | Castelo de SoutomaiorOrt · Vigo | HombreDHojalata | CC BY-SA 3.0 | Original ↗ |
 | Castelo de ToompeaOrt · Tallinn | Ivar Leidus | CC BY-SA 3.0 ee | Original ↗ |
 | Castelo do CastroOrt · Vigo | Unknown authorUnknown author | Public domain | Original ↗ |
 | Castel SismondoOrt · Rimini | RiminiCity | CC BY-SA 3.0 | Original ↗ |
 | Castillo de AlfajarínOrt · Saragossa | Ecelan | CC BY-SA 3.0 | Original ↗ |
 | Castillo de BellverOrt · Palma de Mallorca | Poniol60 | Public domain | Original ↗ |
 | Castillo de CadreteOrt · Saragossa | María Argota Recaj | CC BY-SA 4.0 | Original ↗ |
 | castillo de ChapultepecOrt · Mexiko-Stadt | Memo198 | CC BY-SA 4.0 | Original ↗ |
 | Castillo de DespeñaperrosOrt · Cartagena | P4K1T02 | CC BY-SA 3.0 | Original ↗ |
 | Castillo de GalerasOrt · Cartagena | Daniel-Tordo12 | CC BY-SA 4.0 | Original ↗ |
 | Castillo de GibralfaroOrt · Málaga | Olaf Tausch | CC BY 3.0 | Original ↗ |
 | Castillo de la AlamedaOrt · Madrid | Luis García (Zaqarbal) | CC BY-SA 3.0 es | Original ↗ |
 | Castillo de la AsomadaOrt · Murcia | Laura Pérez Ibáñez | CC BY-SA 4.0 | Original ↗ |
 | Castillo de la Atalaya (Cartagena)Ort · Cartagena | Daniel-Tordo12 | CC BY-SA 4.0 | Original ↗ |
 | Castillo de la ConcepciónOrt · Cartagena | Nanosanchez | Public domain | Original ↗ |
 | Castillo del Campo de la BotaOrt · Barcelona | Unknown authorUnknown author | Public domain | Original ↗ |
 | Castillo de María de HuervaOrt · Saragossa | Mantoide | CC BY-SA 4.0 | Original ↗ |
 | Castillo De MirandaOrt · Saragossa | Daniel Lafranca | CC BY-SA 3.0 | Original ↗ |
 | Castillo de Miravalle (Chapultepec)Ort · Mexiko-Stadt | Own work | CC BY-SA 4.0 | Original ↗ |
 | Castillo de MonteagudoOrt · Murcia | SergioHC | CC BY-SA 3.0 es | Original ↗ |
 | Castillo de NúrembergOrt · Nürnberg | ArtMechanic | CC BY-SA 3.0 | Original ↗ |
 | Castillo de Paso AltoOrt · Santa Cruz de Tenerife | Koppchen | CC BY 3.0 | Original ↗ |
 | Castillo de Rodén (ruinas)Ort · Saragossa | Millars | CC BY-SA 4.0 | Original ↗ |
 | Castillo de San AndresOrt · Santa Cruz de Tenerife | Defisch | CC BY-SA 3.0 | Original ↗ |
 | Castillo de San CristobalOrt · Santa Cruz de Tenerife | Mike Peel | CC BY-SA 4.0 | Original ↗ |
 | Castillo de San CristobalOrt · Las Palmas de Gran Canaria | Victor R. Ruiz from Arinaga, Canary Islands, Spain | CC BY-SA 2.0 | Original ↗ |
 | Castillo de San FernandoOrt · Alicante | User:Etnacila | Public domain | Original ↗ |
 | Castillo de San FranciscoOrt · Las Palmas de Gran Canaria | Raffaesalva | CC BY-SA 4.0 | Original ↗ |
 | Castillo de San Juan (Santa Cruz de Tenerife)Ort · Santa Cruz de Tenerife | Thomas Wolf, www.foto-tw.de | CC BY-SA 3.0 de | Original ↗ |
 | Castillo de San JuliánOrt · Cartagena | Murcianboy | CC BY-SA 3.0 | Original ↗ |
| Castillo de SoutomaiorOrt · Vigo | HombreDHojalata | CC BY-SA 3.0 | Original ↗ |
 | Castillo de VajdahunyadOrt · Budapest | Felix König | CC BY 3.0 | Original ↗ |
 | Castillo de ViñuelasOrt · Madrid | -Merce- from Madrid, España | CC BY-SA 2.0 | Original ↗ |
 | Castillo Ortega-DouglasOrt · Aguascalientes | Luisalvaz | CC BY-SA 3.0 | Original ↗ |
 | Castillo Santa BárbaraOrt · Alicante | H.Helmlechner | CC BY-SA 4.0 | Original ↗ |
 | Castillo SohailOrt · Fuengirola | Olaf Tausch | CC BY 3.0 | Original ↗ |
 | Castle Argyle ApartmentsOrt · Los Angeles | Caterpillar84 | CC BY-SA 4.0 | Original ↗ |
 | Castle Claeys-BouüaertOrt · Gent | Pvhuf at Dutch Wikipedia | Public domain | Original ↗ |
 | Castle Clinton National MonumentOrt · New York | Unknown authorUnknown author | Public domain | Original ↗ |
 | Castle Gatehouse, Washington AqueductOrt · Washington | F.T. Eyre, U.S. Army Corps of Engineers | Public domain | Original ↗ |
 | Castle KeepOrt · Newcastle upon Tyne | Benjamin Smith | CC BY-SA 4.0 | Original ↗ |
 | Castlelaw Hill FortOrt · Edinburgh | Calum McRoberts | CC BY-SA 2.0 | Original ↗ |
 | Castlemaine Perkins BuildingOrt · Brisbane | Kgbo | CC BY-SA 4.0 | Original ↗ |
 | Castle MuseumOrt · Nottingham | Enchufla Con Clave | CC BY-SA 4.0 | Original ↗ |
 | Castle of Los MorosOrt · Cartagena | Rafa Esteve | CC BY-SA 4.0 | Original ↗ |
 | Castle of NiceOrt · Nizza | Fred Romero from Paris, France | CC BY 2.0 | Original ↗ |
 | Castle of Richard LionheartOrt · Kiew | Xsandriel | CC BY-SA 3.0 | Original ↗ |
 | Castle of the Three DragonsOrt · Barcelona | Canaan | CC BY-SA 4.0 | Original ↗ |
 | Castle Old FortOrt · Birmingham | data.gov.uk | OGL 3 | Original ↗ |
 | Castle RockOrt · Edinburgh | unbekannt | Public domain | Original ↗ |
 | Castle StairsOrt · Newcastle upon Tyne | Ymblanter | CC BY-SA 4.0 | Original ↗ |
 | Castle StairwayOrt · Benidorm | Simon Cobb | CC0 | Original ↗ |
 | Castle ViewOrt · Edinburgh | Stephencdickson | CC BY-SA 4.0 | Original ↗ |
 | Castle WilliamsOrt · New York | Jim.henderson | Public domain | Original ↗ |
 | Castril PalaceOrt · Granada | SaraGuerri | CC BY-SA 3.0 | Original ↗ |
 | Castro's FortressOrt · Vigo | Zarateman | CC0 | Original ↗ |
 | Castrum de DijonOrt · Dijon | Arnaud 25 | CC BY-SA 3.0 | Original ↗ |
 | Catacomba ebraica di via AppiaOrt · Rom | Mister No | CC BY 3.0 | Original ↗ |
 | Catacomba ebraica di via AppiaOrt · Rom | Mister No | CC BY 3.0 | Original ↗ |
 | Catacomba ebraica di via AppiaOrt · Rom | Dieterdreist | CC BY-SA 4.0 | Original ↗ |
 | Catacomba ebraica di via AppiaOrt · Rom | Dieterdreist | CC BY-SA 4.0 | Original ↗ |
 | Catacombe di CommodillaOrt · Rom | unbekannt | Public domain | Original ↗ |
 | Catacombe di PretestatoOrt · Rom | Wilpert | Public domain | Original ↗ |
 | Catacombe di PriscillaOrt · Rom | Unknown authorUnknown author | Public domain | Original ↗ |
 | Catacombe di Santa AgneseOrt · Rom | Folajimi | CC BY-SA 2.5 | Original ↗ |
 | Catacombe di Sant'Ilaria (e dei Giordani)Ort · Rom | unbekannt | Public domain | Original ↗ |
 | Catacombe San SebastianoOrt · Rom | Mister No | CC BY 3.0 | Original ↗ |
 | Catacombe San SebastianoOrt · Rom | Kent Wang | CC BY-SA 2.0 | Original ↗ |
 | Catacombe San SebastianoOrt · Rom | Mister No | CC BY 3.0 | Original ↗ |
 | Catacombe San SebastianoOrt · Rom | Mister No | CC BY 3.0 | Original ↗ |
 | Catacombs of San GaudiosoOrt · Neapel | Mentnafunangann | CC BY-SA 3.0 | Original ↗ |
 | Catacombs of San GennaroOrt · Neapel | Dominik Matus | CC BY-SA 4.0 | Original ↗ |
 | Catalina HouseOrt · London | Hjamesberglen | CC BY-SA 4.0 | Original ↗ |
 | Catedral de AquisgránOrt · Aachen | CEphoto, Uwe Aranas | CC BY-SA 3.0 | Original ↗ |
 | Catedral de IbizaOrt · Ibiza | Jaume Meneses | CC BY-SA 2.0 | Original ↗ |
 | Catedral de MálagaOrt · Málaga | Euku | CC BY-SA 3.0 | Original ↗ |