SZT3517033: City side of the Stargader Tor in Neubrandenburg, 1963 (b/w photo) / Bridgeman Images

SZT3517041: The pre-gate of the Treptower Tor, Neubrandenburg, 1963 (b/w photo) / Bridgeman Images

LCP463647: General view of Laurel Hill Cemetery, printed by Wagner & McGuigan, 1844 (litho) , Pinkerton, E. J. (fl.1844) / Library Company of Philadelphia, PA, USA / Bridgeman Images

SZT3517035: The pre-gate of the Treptower Tor, Neubrandenburg, 1963 (b/w photo) / Bridgeman Images

STC171175: Designs for cast-iron railings, from 'Macfarlane's Castings' (engraving) (b/w photo), English School, (19th century) / Private Collection / Bridgeman Images

STC171177: Designs for cast-iron railings, from 'Macfarlane's Castings' (engraving) (b/w photo), English School, (19th century) / Private Collection / Bridgeman Images

MEP1266548: Last Judgement (Giudizio Universale), by Giotto, 1303-1305, 14th century (fresco), Giotto (Giotto di Bondone) (c.1266-1337) / Scrovegni Chapel (Cappella degli Scrovegni), Padua, Italy / Bridgeman Images

STC171171: Designs for cast-iron railings, from 'Macfarlane's Castings' (engraving) (b/w photo), English School, (19th century) / Private Collection / Bridgeman Images

PC1278745: Window depicting Saint John in boiling oil at the Latin Gate (stained glass), French School, (14th century) / St. Jean-Baptiste, Niederhaslach, France / Bridgeman Images

SGS120410: A View in Nuremberg, c.1823 (w/c on paper), Prout, Samuel (1783-1852) / The Berger Collection at the Denver Art Museum, USA / Bridgeman Images

SAO3858027: Powder Gate / Bridgeman Images

SZT3517001: The Staendehaus and the Steintor in Rostock, 1963 (b/w photo) / Bridgeman Images

PPH617974: Highgate West (photo) / Highgate Cemetery, London, UK / Bridgeman Images

NCO374283: Chapel porch, New College, Oxford (crayon & w/c on paper), Milner-Gulland, Alison (20th century) / Courtesy of the Warden and Scholars of New College, Oxford / Bridgeman Images

XCF273199: View of Lincoln Cathedral (photo) / Lincoln, Lincolnshire, UK / Bridgeman Images

STC214673: Temple at Strawberry Hill, from 'Sketches from Nature', published 1822 (hand-coloured etching), Rowlandson, Thomas (1756-1827) / Private Collection / Bridgeman Images

NCO256317: Victorian sewing cabinet panel decorated with a scene of Christ Church, Oxford (papier mache), English School, (19th century) / Courtesy of the Warden and Scholars of New College, Oxford / Bridgeman Images

TEC4554153: Cathedrale Notre Dame de Laon, Laon (Aisne, Picardy region). / Bridgeman Images

SNK993790: Powder Tower, Prague, Czech Republic (photo) / Bridgeman Images

SZT3517037: The pre-gate of the Treptower Tor, Neubrandenburg, 1963 (b/w photo) / Bridgeman Images

SZT3517034: View of the Treptower Tor in Neubrandenburg, 1963 (b/w photo) / Bridgeman Images

SNK993791: Neo-Gothic façade of the Powder Tower, Prague, Czech Republic (photo) / Bridgeman Images

XCF273198: View of Lincoln Cathedral (photo) / Lincoln, Lincolnshire, UK / Bridgeman Images

HJA146096: View westwards from the house (photo) / Harlaxton Manor, Lincolnshire, UK / Bridgeman Images

LLM3094647: Medical School, Edinburgh University (colour photo), English Photographer, (20th century) / Private Collection / Bridgeman Images

SZT3517048: View of Altentreptow 1963 (b/w photo) / Bridgeman Images

FAF3565231: The tower of the Porta Sant'Angelo, in Perugia / Bridgeman Images

JB226874: St Giles Church and square (photo), Spanish School / Burgos, Castilla y Leon, Spain / Bridgeman Images

MAE6268374: Cathedral (Cathédrale Saint-Étienne). Exterior. West façade. Right porch no1 (La Vie de saint Etienne). Detail. The door. / Bridgeman Images

FAF3568162: The door of San Lorenzo's church in Verona, Zenker, Otto (fl.1950-60) / Bridgeman Images

XJF465119: St George's Church, Rams-gate, engraved by Thomas Garner, 1830 (engraving), Shepherd, George Sidney (1784-1862) (after) / Private Collection / Bridgeman Images

FAF3573598: The Catalan gothic portal from the ruins of the Church of San Giorgio Vecchio in Ragusa (b/w photo) / Bridgeman Images

FER185667: Norwich Cathedral from the South-East (pencil, ink & w/c on paper), Dayes, Edward (1763-1804) / Ferens Art Gallery, Hull Museums, UK / Bridgeman Images

JFS134040: Dogliani Cemetery, designed in 1872 (photo), Schellino, Giovanni Battista (fl.1872) / Dogliani, Piedmont, Italy / Bridgeman Images

FAF3568225: Gate of the Cappellone degli Spagnoli entrance, chapter house of Santa Maria Novella church, Florence, Zenker, Otto (fl.1950-60) / Bridgeman Images

NCO232971: New College Oxford: Proposed Gates and Railing for Entrance to Garden, 1874 (ink on paper), Scott, George Gilbert (1811-1878) / Courtesy of the Warden and Scholars of New College, Oxford / Bridgeman Images