Concept: keystone
Label (en): keystone
Description (en): architectural element: wedge-shaped stone of an arch
Also known as (en): capstone
Label (es): clave
Description (es): dovela central de un arco o una bóveda
Also known as (es): espinazo
Label (ca): clau de volta
Label (it): Chiave di volta
Subclass of: sculpture, architectural element