TRK831687: Pre-romanesque Church of Saint Peter. Terrassa. Spain. / Bridgeman Images

TRK878792: Mosaic depicting Christ with the Virgin and Saint Minias. 13th century. Basilica of Saint Minias on the Mountain. Italy. / Bridgeman Images

TRK1152102: Italy. Rome. Basilica of Saint Cecilia in Trastevere. / Bridgeman Images

UIG1569260: Presentation of Jesus at the Temple Sculpted on the Choir Screen in the Ambulatory of Chartres Cathedral, Chartres, France (sculpture) / Bridgeman Images

GRL2562764: Partial view of the Torrazzo and the Town Hall Palace, Cremona, Lombardy, Italy (photo) / Bridgeman Images

UTD2864957: Watchout at Allenstein castle in East Prussia, Germany 1930s (b/w photo) / Bridgeman Images

UTD2864964: The St Jacob's church at Allenstein East Prussia, Germany 1930s (b/w photo) / Bridgeman Images

TRK3597961: Spain, Leon, Santa Maria de Leon Cathedral, Gothic style, Facade, 13th-14th century / Bridgeman Images

DGA1089779: Reflection of a castle on the river, Nogat River, Malbork Castle, Malbork, Pomorskie Province, Poland / Bridgeman Images

UDK838277: Spain, Northern Spain, La Rioja, Logrono, Iglesia de San Bartolome, detail of portal, stone sculpted figures / Bridgeman Images

UDK839105: France, Alsace, Strasbourg, Cathedral of Notre Dame (Notre Dame de Strasbourg), depiction of the adoration of the Magi, sculptures of Jakob von Landshut (Jacques de Landshut) / Bridgeman Images

DGA914347: Horse Soldiers, detail from fresco cycle Stories of Romulus and Remus, by Gentile da Fabriano (ca 1370-1427) and collaborators / Bridgeman Images

DGA924726: Fountain of 99 Spouts (13th century), L'Aquila, Abruzzo, Italy, Detail of masks / Bridgeman Images

DGA1257983: Reinli stave church, 1326, Wooden church, Norway, 14th century / Bridgeman Images

DGA1129873: Sarzanello fortress in Sarzana, 10th century, residence of Castruccio Castracani, Liguria, Italy / Bridgeman Images

DGA1132468: Interior of the mosque, Great Mosque of Cordoba, today the Cathedral of the Assumption of Our Lady, 8th century, Cordoba (UNESCO World Heritage Site, 1984), Andalusia, Spain / Bridgeman Images

DGA625863: The frescoes by Matteo di Giovanetto (1300-1369) in St Martial chapel, Papal Palace in Avigno, France / Bridgeman Images

DGA763863: Italy, Venice, Doge's Palace, Head of Tartar warrior, detail from capital, 15th century / Bridgeman Images

DGA758049: Apocalyptic Christ in Vesica Piscis or mandorla mistica with Seven Angels, Seven Candelabr and Seven Church of Asia Minor, early 13th century fresco in Crypt of St Magnus, St Mary Cathedral, Anagni, Lazio, Italy, 13th century / Bridgeman Images

DGA645434: Marian Altar, 1498, attributed to Veit Stoss, Elder (1445-1450 - 1533), St. John's chapel, Nonnberg Convent, Salzburg, Detail, Austria, 15th century / Bridgeman Images

DGA756239: St Nicholas being crowned by angel, scene from Stories of St Nicholas of Tolentino, 1320-1325, by unknown artist, fresco, Chapel of St Nicholas, Basilica of Saint Nicolas of Tolentino, Tolentino . Italy, 14th century. / Bridgeman Images

DGA1130619: St George's Cathedral, founded in 13th century, Yuriev-Polskiy, Golden Ring, Russia / Bridgeman Images

DGA1131701: Basilica of Holy Trinity of Saccargia, 12th century, Romanesque style, constructed from black trachyte and white limestone, Codrongianus, Sardinia, Italy / Bridgeman Images

DGA1131363: Room with fireplace, Stokesay castle, Fortified manor example of 13th century, Ludlow, Shropshire, United Kingdom / Bridgeman Images

DGA1133949: Tower of Scaliger castle, Scala family castle, 13th-14th century, Sirmione, Lombardy, Italy / Bridgeman Images

DGA2589911: Leone castle, 13th century, Lana, Burgraviato, Trentino-Alto Adige, Italy / Bridgeman Images

HRP5245527: The Tower of London / Bridgeman Images

HIM5247970: Reconstitution d'un office de moines cisterciens dans le monastere de l'Abbaye de Rievaulx, dans le Nord du Yorkshire (Angleterre). Dessin de Paul Highnam, 1990. English Heritage, National Monuments Record / Bridgeman Images

HIM5247971: Prieure des Augustins, a Kirkham, Nord du Yorkshire (Angleterre), construit en 1125. English Heritage, National Monuments Record / Bridgeman Images

SZT5978800: Archangel Michael, St Mary's Cathedral, Erfurt, Germany, 14th century, 2001 (photo) / Bridgeman Images

SZT5978833: West portal of the Cathedral of Saints Maurice and Catherine, Magdeburg, Germany (photo) / Bridgeman Images

EHT3620013: Detail view of frescoes in the chancel, including a chequered pattern around the north window, c.1130 (fresco), English School, (12th century) / Bridgeman Images

EHT3620017: Christ with seraphim and the evangelists, detail from the chancel ceiling, c.1130 (fresco), English School, (12th century) / Bridgeman Images

GCL3349120: FRANCE: REIMS CATHEDRAL The Cathedral of Notre-Dame de Reims. Line engraving, 19th century. / Bridgeman Images

EHT808494: Salisbury Cathedral, Wiltshire: the Cathedral Church of St Mary towering over silhouetted buildings and trees, illuminated against the night sky by floodlights, 1958 (b/w photo), Gay, John (1909-99) / Bridgeman Images

DGA542900: Portugal, Lisbon, Belem Tower (1515-1521) designed by architect Francisco de Arruda, night view / Bridgeman Images