Headstone
Of arch and building block. May also be referred to as key and keystone.
The central building block at the top of an arch or vault.
This concept's ID is @1~19620
Contains
- quoin
The keystone of an arch.
Of arch and building block. May also be referred to as key and keystone.
The central building block at the top of an arch or vault.
This concept's ID is @1~19620
The keystone of an arch.