TRK831752: Italy. Milan. Cathedral. Gothic. 14th century. Exterior. Facade. / Bridgeman Images

TRK831895: Finalnd. Turku. Castle. / Bridgeman Images

TRK831896: Finalnd. Turku. Castle. / Bridgeman Images

TRK832857: Mshatta Palace. 8th century. Facade. Detail. / Bridgeman Images

DGC1126751: Detail of a zoomorphic Capital from one of the original columns. (granite), Portuguese School, (12th century) / Bridgeman Images

KWE322656: The Tower of London in the 15th century, from 'The National and Domestic History of England' by William Hickman Smith Aubrey (1858-1916) published London, c.1890 (litho), English School, (19th century) / Bridgeman Images

LLM3627247: The Divinity School, Oxford (colour photo), English Photographer, (20th century) / Bridgeman Images

TRK3598078: Spain, Burgos Cathedral (colour engraving) / Bridgeman Images

LLM5999741: Norman doorway of St Nicholas Church, New Romney, Kent (b/w photo), English Photographer, (20th century) / Bridgeman Images

FLO4703376: Knights performing the Torch Dance (Fackeltanz). They wear plumed helmets, face masks and short jackets with ribbons from the shoulder. From Hans Burgkmair's Triumph of Emperor Maximilian I, 1526. Handcoloured copperplate engraving from Robert von Spalart's Historical Picture of the Costumes of the Principal People of Antiquity and of the Middle Ages. / Bridgeman Images

GDG619817: Bimaristan al-Arghun, courtyard (photo) / Bridgeman Images

TRK697087: Ozbek Han Mosque, Staryi Krym, Autonomous Republic of Crimea, Ukraine (photo) / Bridgeman Images

MFI701761: East Window at Gloucester Cathedral (photo) / Bridgeman Images

HGP362530: Lavenham Guildhall (photo) / Bridgeman Images

SAP479061: Belmonte Castle, Cuenca Province, Spain, 2007 (photo) / Bridgeman Images

JB24646: Exterior view, Deanery Tower, Hadleigh, Essex, built 1495 (photo) / Bridgeman Images

MAE340712: View of the west portal (photo) / Bridgeman Images

MAE413588: Cathedral of Santa Maria de Siguenza (photo) / Bridgeman Images

HGP809173: Prior's Lodgings, Castle Acre Priory, Norfolk (photo) / Bridgeman Images

HGP809210: St Ethelbert's Gate, Norwich Cathedral (photo) / Bridgeman Images

HGP873017: Octagon and Lantern Towers from West Tower, Ely Cathedral, Ely, UK (photo) / Bridgeman Images

TRK879565: Italy. Milan. Cathedral. Gothic. 14th century. Exterior. Detail. Facade. Angel. / Bridgeman Images

SZT1076323: View of the city center of Aachen with the cathedral, the town square and the town hall, Germany, 2010 (photo) / Bridgeman Images

MES3470011: View of the Fortress, Populonia Alta, Tuscany, Italy (photo) / Bridgeman Images

MAE3469447: View of the nave, Cathédrale Saint-Etienne, Sens, Bourgogne, Yonne, France (photo) / Bridgeman Images

DSP3503433: Irish National Heritage Park, Co Wexford, Ireland; Round Tower Replica Built In 1857 (photo) / Bridgeman Images

DSP3503230: Sheep On A Snow Covered Landscape In Front Of A Castle, Rock Of Castle, Castle, County Tipperary, Republic Of Ireland (photo) / Bridgeman Images

SCN3249099: Interior of the Old Catholic Cathedral, Brescia, Italy (photo) / Bridgeman Images

DSP3254718: UK, Ireland, County Kerry, Ballinskelligs Castle (photo) / Bridgeman Images

PFH3614473: Italy: Facade of the Cathedral of Saint Mary of the Assumption (Duomo di Siena), Siena / Bridgeman Images

HGP2629363: Fountains Abbey viewed from the West, near Ripon, Yorkshire (photo) / Bridgeman Images

HGP2629369: Fountains Abbey, near Ripon, Yorkshire (photo) / Bridgeman Images

UTD2842537: Wartburg castle on a mountain top / Bridgeman Images

UTD2841546: Boulogne sur Mer, Castle / Bridgeman Images

UTD2841560: Juilly / Bridgeman Images

GRL6166260: View of the cloister, XII century (photo) / Bridgeman Images