DGA925169: Face of Christ Pantocrator, Detail of Romanesque frescoes in Byzantine style, Late 11th century, Chapel of Saint Eldrad and Saint Nicholas, Novalesa Abbey, Piedmont, Italy, Byzantine, (11th Century) / Bridgeman Images

DGA1080681: Low angle view of the tiled roof of a church, St Stephens Cathedral, Vienna, Austria / Bridgeman Images

DGA1131357: Hereford cathedral, 12th-14th century, Hereford, Herefordshire, United Kingdom / Bridgeman Images

DGA1134199: Fortress on a landscape, Krak Des Chevaliers, Syria (photo) / Bridgeman Images

DGA1133811: Ceri, 13th-14th century, Cerveteri, Lazio, Italy / Bridgeman Images

DGA1133873: Cathedral of Saint Mary of Assumption, 12th-13th century, Piazza Battisti, Rieti, Lazio, Rome / Bridgeman Images

DGA1133881: Ruins of Rocca Calascio, 11th century, towers were built in 15th century, Gran Sasso and Monti della Laga National Park, Abruzzo, Italy / Bridgeman Images

DGA1132567: Piazza dei Signori with the western facade of Palazzo dei Trecento, 12th-13th century, with the Podesta palace on the left, 13th century, Treviso, Veneto, Italy / Bridgeman Images

DGA5241804: Medieval house demolished in Via Giulia during the construction works of the embankment along the Tiber, Rome, Italy, engraving from a drawing by Dante Paolocci, from L'Illustrazione Italiana, year 10, no 46, November 18, 1883 / Bridgeman Images

DGA627054: San Simeon, detail from main door of Notre-Dame Cathedral of Reims, Reims, Champagne-Ardenne, France, 13th century / Bridgeman Images

DGA1258814: Cloister and bell tower of Cathedral of St Trophime (Trophimus), Arles (UNESCO World Heritage List, 1981), Provence-Alpes-Cote d'Azur, France, twelfth century / Bridgeman Images

DGA2661563: Scenes of the life of Jesus, frescoes in the monastery of Panagia Mavriotissa, Kastoria, West Macedonia, Greece, 11th-13th century (photo) / Bridgeman Images

ODN3876276: Carcassonne / Bridgeman Images

DGA758252: Trifora (mullioned window with three lights) and mosaic depicting St Matthew the Evangelist, St Mark the Evangelist, angel and stylized and nature motifs, south wall and groin vault of the presbytery, Basilica of San Vitale, Ravenna, Emilia-Romagna. Italy / Bridgeman Images

DGA1129928: Pisa Cathedral, 11th century (UNESCO World Heritage List, 1987), Piazza dei Miracoli, Pisa, Tuscany, Italy / Bridgeman Images

DGA913867: Royal Monastery of St Mary of Guadalupe (14th century) (Unesco World Heritage List, 1993), Guadalupe, Extremadura, Spain / Bridgeman Images

DGA910035: Teutonic Chapel of Saint Peter's Basilica, Vatican City / Bridgeman Images

FIA5334243: Saint Nicholas of Lipna, 1294 (tempera on wood), Petrov, Aleksa (active c.1294) / Bridgeman Images

DPS3503608: Castle Roche, Co Louth, Ireland; 13Th Century Norman Castle (photo) / Bridgeman Images

DPS3503546: Baltinglass Abbey, Co Wicklow, Ireland; 12Th Century Cistercian Abbey (photo) / Bridgeman Images

DPS3503793: Doe Castle, Co Donegal, Ireland; 16Th Century Fortalice (photo) / Bridgeman Images

DPS3255863: Killarney, Co Kerry, Ireland, Ross Castle (photo) / Bridgeman Images

KW383412: View of the Alcazar (photo) / Bridgeman Images

LLM3647458: Church of Santiago del Arrabal, Toledo, Spain (engraving), German School, (19th century) / Bridgeman Images

UIG1566282: Toompea Castle and Tall Hermann Tower in Tallinn, Estonia (photo) / Bridgeman Images

UIG1569406: Chateau De Chambord Reflected in the Cosson River, France (photo) / Bridgeman Images

UIG1569256: Reliquary For the Virgin Mary's Cloak in Chartres Cathedral, Chartres, France (photo) / Bridgeman Images

GBW446751: View of the altar, Chapel of Works, Cathedrale Saint-Gervais-et-Saint-Protais, Soissons, Aisne, France, 1917 (autochrome), Cuville, Fernand (1887-1927) / Bridgeman Images

TRK558681: Novalesa Abbey. Chapel of Saint Eldrado and Saint Nicholas. Frescoes. Italy. / Bridgeman Images

UTD2865030: Entrance to the courtyard of Ordensburg Marienburg, West Prussia, Germany 1930s (b/w photo) / Bridgeman Images

UTD2865035: Well at the inner courtyard of Ordensburg Marienburg, West Prussia, Germany 1930s (b/w photo) / Bridgeman Images

GRL6166291: While the soul of the poor man approaches heaven securely in the bosom of Abraham, the rich man must atone for his sins in the fires of Hell, 12th century / Bridgeman Images

GRL6372538: Genoa, Duomo (St Lawrence Cathedral), West side, the façade, the main doorway: detail of the lunette with "The Martyrdom of St Lawrence", by Master of lunette of the Genoa Cathedral, 1225 / Bridgeman Images

GRL5974196: Detail of the floor with decorative motif representing arches (or vaio) with works by Campionese Masters, XII - XIII century, Torresani Hall, Ghirlandina Tower, Modena, Italy (photo) / Bridgeman Images

UTD2874630: Area of the Nuremberg rally at the Luitpoldhain grove, Germany 1930s (b/w photo) / Bridgeman Images

UTD2875323: People strolling through the old city of Nuremberg near the Spittlerturm tower, Germany 1930s (b/w photo) / Bridgeman Images