A blue door with a coal hole cover in front of it, Lancaster, England

I’ve walked past these coal hole covers for over 20 years without realising what they were https://en.wikipedia.org/wiki/Coal_hole

To be fair, they're next to squarish covers labelled "Water" and even the roads nearby don't have coal holes

#DoorsDay #DoorThursday #Door #CoalHoleCover #CoalHole #opercula #StreetFurniture #ManholeCovers #photography #design #history

Prismatic coal hole cover on Hope Street in Glasgow. These were were commonly used allow natural light into the otherwise pitch black cellars. Only a few of the original prisms remain in this particular example.

#glasgow #coalholecover #coalhole #prisms #streetfurniture #manholecovers #glasgowhistory

Prismatic coal hole cover on Hope Street in Glasgow. Coal holes in the street allowed deliveries to coal cellars without having to carry the coal through a building. Prismatic coal hole covers were commonly used allow natural light into the otherwise pitch black cellars. Only a few of the original prisms remain in this particular example.

#glasgow #coalholecover #coalhole #prisms #streetfurniture #manholecovers #glasgowhistory

Prismatic coal hole cover on Hope Street in Glasgow. Coal holes in the street allowed deliveries to coal cellars without having to carry the coal through a building. Prismatic covers were commonly used allow natural light into the otherwise pitch black coal cellars. Only a few of the original prisms remain in this particular example

#glasgow #coalholecover #coalhole #prisms #streetfurniture #manholecovers #glasgowhistory