UIG543504: Germany, Rothenburg Ob Der Tauber. Overview / Bridgeman Images

UIG1569545: View of the Bay from the Ramparts, Mont Saint-Michel, France (photo) / Bridgeman Images

MAE340577: Detail of a capital depicting a woman being attacked by lions (photo) / Bridgeman Images

VLS875193: Church of San Martino, Randazzo, Sicily (photo) / Bridgeman Images

KW3058331: Florence, Tuscany, Italy. Close-up of the medieval Ponte Vecchio, or Old Bridge, on the Arno River. (photo) / Bridgeman Images

MAE3469580: Mural on Plateau Saint-Michel, Rocamadour, Midi-Pyrénées, Lot, France (photo) / Bridgeman Images

HGP405330: Sherborne Abbey (photo) / Bridgeman Images

MES3469923: Detail of a man with pointed finger, possible an apostle (fresco), Croatian School (14th century) / Bridgeman Images

TMA106125: Carved wooden heads from the House of the Consuls, Mirepoix, France (b&w photo) / Bridgeman Images

FLO6339916: The Castle of Wufflens or Vufflens, medieval castle in the canton of Vaud, Switzerland, Chateau Wufflens, Schloss Wufflens, Pays de Vaud, British School, (18th-19th century) / Bridgeman Images

DGA1090127: Italy, Emilia-Romagna region, Forlì, Rocca, Fortress / Bridgeman Images

DGA1132172: Columns of a Roman temple, Casamari abbey (11th-13th century), Veroli, Lazio, Italy / Bridgeman Images

DGA514913: Italy, Emilia Romagna, Ferrara Province, view of Pomposa Abbey / Bridgeman Images

UDK836917: Italy, Tuscany, Lucca, Torre dei Giunigi, medieval brick tower with trees growing from top, close-up / Bridgeman Images

TRK1031053: Syria. Great Mosque of Damascus. / Bridgeman Images

BLP398304: View of a gate (photo) / Bridgeman Images

TRK559229: Church of St. John the Baptist. Mondragon. Province of Guipuzcoa. Basque Country. / Bridgeman Images

DGA5651876: Emperor's Castle, Prato, Tuscany, Italy, 12th-16th century / Bridgeman Images

DGA5651811: Montevecchio Vesponi Castle, Castiglione Fiorentino, Tuscany, Italy, 11th-14th century / Bridgeman Images

SZT11770773: Saxony, Goerlitz, Medieval Old Town Chemnitz, Sonnenberg, 1992 (photo), Glaser, Paul / Bridgeman Images

LUX4728512: Ascain, Pyrenees-Atlantiques (64): The medieval bridge of Ascain, 1904 / Bridgeman Images

DGA3675515: Medieval tower, Capo d'Orso, Amalfi Coast (UNESCO World Heritage Site, 1997), Campania, Italy / Bridgeman Images

DGA3240709: Moat and Caerphilly castle, largest medieval fortress of Wales, United Kingdom, 12th century / Bridgeman Images

MEP2387548: Medieval statues loaded on a truck parked before Palazzo Vecchio / Bridgeman Images

XIR245726: View of the chevet of the church, built 1260-1320 (photo), French School / Bridgeman Images

MEP943300: Aisle, by Unknown Artist, 11th Century, fresco / Bridgeman Images

LUX4703269: Antwerp: Cathedrale Notre Dame (1352-1521), medieval cathedrale with its belfry bell tower, 1880 / Bridgeman Images

IBE5343352: Crypt of Saint Antolin, Cathedral of Palencia, Spain, 7th century (photo), Visigothic, (7th century) / Bridgeman Images

HGP2607318: Beheading of St. Catherine, and Emperor Maxentius, Pickering, Yorkshire (photo) / Bridgeman Images

DGA1090231: Plants in the backyard of a castle, Chateau de Lespinasse, Auvergne, France / Bridgeman Images

DGA644999: Armenia, near Lake Sevan, Architectural detail from Church of Holy Mother of God, 1215-1255 / Bridgeman Images

DGA646448: Spain, Saragossa, Taifal Palace, Santa Isabel Patio / Bridgeman Images

DGA646872: Crest of Sines Castle. Portugal, 13th century. / Bridgeman Images

DGA911480: Towers with barbican, double enclosure walls, Carcassonne (Unesco World Heritage List, 1997), Languedoc-Roussillon, France / Bridgeman Images

DGA914142: Castle (13th century) in Oberhofen, Canton of Bern, Switzerland / Bridgeman Images

DGA914380: Transept with protruding arches (1338), Wells Cathedral, England, United Kingdom / Bridgeman Images