DGA912859: View of Town Hall Square, 13th-14th century, Massa Marittima, Tuscany, Italy / Bridgeman Images

DGA910913: The baptism of Clovis, statues above rose window (13th century), Cathedral of Notre-Dame (UNESCO World Heritage Site, 1991), Reims, Champagne-Ardenne, France / Bridgeman Images

DGA572213: Russia, Suzdal, convent and cathedral of Intercession at Pokrovskij Monastery / Bridgeman Images

DGA572218: Russia, Suzdal, domes of Saint Alexander Convent at Aleksandrovskij Monastery / Bridgeman Images

DGA2595976: Golden-domed al-Askari mosque, before attacks in 2006 and 2007, Samarra, Iraq, 10th-12th century / Bridgeman Images

DGA2591058: Castle of Dukes or Grand Logis, Argentan, Basse-Normandie, France, 12th-14th century / Bridgeman Images

DGA758437: View of right transept of Cathedral of Santa Maria Assunta, Cremona. Italy, 12th-14th century. / Bridgeman Images

DGA757290: Detail from the Romanic rose-window in the Church of Santa Maria Maggiore, Tuscania. Italy, 11th-12th century. / Bridgeman Images

DGA756792: Interior of the Cathedral of San Ciriaco, Ancona. Italy, 11th-12th century. / Bridgeman Images

DGA1134123: Syria - Aleppo (Halab). Historical Aleppo. UNESCO World Heritage List, 1986. Citadel, 13th century. Royal Palace. Royal Hall (photo) / Bridgeman Images

DGA3240575: Cloister and bell tower of Mainz cathedral, Rhineland-Palatinate, Germany, 10th-12th century / Bridgeman Images

DGA3240792: Holy water belfry and clock tower, Cluny abbey, Burgundy, France, 10th-12th century / Bridgeman Images

DGA2590916: Tower in medieval style, 19th century, Hameau de Quehen Castle, 16th-17th century, Isques, Nord-Pas de Calais, France. / Bridgeman Images

DCO9031895: Chartres Cathedral, Stained glass window depicting 4 panels of stained glass above the west portal: Rose window (top), Passion (Left), Nativity (center), & Jesse (right) (stained glass), French School, (13th century) / Bridgeman Images

DCO9031906: Chartres Cathedral, Stained glass window depicting the Blue Virgin (stained glass), French School, (13th century) / Bridgeman Images

DCO9031920: Chartres Cathedral, Stained glass window depicting Charlemagne (stained glass), French School, (13th century) / Bridgeman Images

STF452189: Sigmundskron castle, near Bozen (Bolzano), Italy (photo) / Bridgeman Images

JCH316150: The Crusader Castle of Krak des Chevaliers (photo) / Bridgeman Images

MAE340593: The west facade (photo) / Bridgeman Images

MAE340706: View of the Alcazar of Segovia (photo) / Bridgeman Images

LLM5999054: High Altar, Westminster Abbey, London (photo), English Photographer, (20th century) / Bridgeman Images

UIG1566391: Passage Along the Cloister in the Mainzer Dom (Mainz Cathedral Or St. Martin's Cathedral), Mainz, Germany (photo) / Bridgeman Images

UIG1566437: Porta Nigra Roman Gateway, Trier, Rhineland-Palatinate, Germany (photo) / Bridgeman Images

UIG1566253: The Great Coastal Gate, Tallinn, Estonia (photo) / Bridgeman Images

UIG1566402: Virgin and Child Statue on A Half-Timbered House on the Kirschgarten, Mainz, Germany (photo) / Bridgeman Images

UIG1566393: Passage Along the Cloister in the Mainzer Dom (Mainz Cathedral Or St. Martin's Cathedral), Mainz, Germany (photo) / Bridgeman Images

PFH3614474: Italy: Bronze central entrance door, Cathedral of Saint Mary of the Assumption (Duomo di Siena), Siena / Bridgeman Images

PFH3614477: Italy: Saints and horse, facade right, Cathedral of Saint Mary of the Assumption (Duomo di Siena), Siena / Bridgeman Images

UIG1565139: Pilgrim's Pulpit at St. Stephen's Cathedral, Vienna (Wien), Austria (photo) / Bridgeman Images

UIG1565015: St. Sofia Church, Sofia, Bulgaria (photo) / Bridgeman Images

UIG1565131: Interior of St. Stephen's Cathedral, Vienna (Wien), Austria (photo) / Bridgeman Images

UIG1566447: Porta Nigra Roman Gateway, Trier, Rhineland-Palatinate, Germany (photo) / Bridgeman Images

UIG1566325: Crucifix in the Old Town of Tallinn, Estonia (photo) / Bridgeman Images

UIG1566296: People in Front of the Viru Gate at Tallinn, Estonia (photo) / Bridgeman Images

UIG1566806: Sculpture on the Facade of St. Vitus Cathedral, Prague, Czech Republic (photo) / Bridgeman Images

UIG1567261: Frauenkirche, Munich, Bavaria, Germany (photo) / Bridgeman Images