Tulip Stairs: Queen's House

 

 

I'm obsessed with these stairs.

 

The Tulip Stairs is the first centrally unsupported helical stairs constructed in England. The stairs are supported by a combination of support by cantilever from the walls and each tread resting on the one below wikipedia

 

 

www.buildingconservation.com/articles/stonecantstairs/sto...

Done