14th-century fortifications

Anadoluhisarı (), known historically as Güzelce Hisar ("the Beauteous Fortress") is a medieval Ottoman fortress located in Istanbul, Turkey on the Anatolian (Asian) side of the Bosporus. The complex is the oldest surviving Turkish architectural structure built in Istanbul, and further gives its name to the neighborhood around it in the city's Beykoz district.

castle in Angus, Scotland, UK

mid-14th-century fortress east of North Berwick, in East Lothian, Scotland, UK

building in Copenhagen, Denmark

fortress just north of Gothenburg, Sweden

castle in Germany

château in Lower Saxony, Germany

castle

City gate in Lublin, Poland

Grade I listed building in Denbighshire. Castle in Denbigh

castle near the village of Roslin in Midlothian, Scotland, UK

medieval castle in Farleigh Hungerford, Somerset, England, UK

historic site in Darłowo, West Pomeranian Voivodeship in Poland

thumb|right|300px|Plan of the fortress, 1784 Khadjibey (; ) was a fortress and a haven by the Gulf of Odesa, in the location of the modern city of Odesa, Ukraine. The settlement was destroyed and abandoned in the 15th or 16th century and was revived under the Ottoman Empire in the 18th century.

castle in Palas de Rei, Lugo

castle in North Yorkshire, England, UK

Grade I listed building in Cumbria, United Kingdom

castle in Rhineland-Palatiante, Germany

concentric castle in Queenborough, Swale, England, UK

gate in Sandomierz, Poland

castle near Swalmen, Netherlands