English operator: Panoramio described at URL: https://web.archive.org/web/20161022071308/http://www.panoramio.com/photo/67506124 determination method...
Ceilings in Lincoln Cathedral English operator: Panoramio described at URL: https://web.archive.org/web/20161019213152/http://www.panoramio.com/photo/67507090...
English East end of Lincoln Cathedral, with wall buttress, and chapter house with flying buttresses. (1185–1311) operator: Panoramio described at URL: https://web...
English operator: Panoramio described at URL: https://web.archive.org/web/20161023172345/http://www.panoramio.com/photo/67508560 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161020002218/http://www.panoramio.com/photo/67507024 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161023234756/http://www.panoramio.com/photo/67508344 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161021104637/http://www.panoramio.com/photo/67506965 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161022130547/http://www.panoramio.com/photo/67508529 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161024010440/http://www.panoramio.com/photo/67507483 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161021035732/http://www.panoramio.com/photo/67508064 determination method...
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