MJ Maccardini (trailerfullofpix)'s photos with the keyword: mark

These plaques indicated the company insuring the building. In the 18th and 19th centuries, each insurance company had its own fire brigade (before municipal brigades were formed). en.wikipedia.org/wiki/Fire_insurance_mark

Lovely crescent, built in the mid-1800s, just off the Caledonian Road near King's Cross station. It has the smallest radius of any crescent in Europe and is unique in that there are houses along both sides.