Editing Keystone (architecture) (section)

== Gallery ==
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Image:8500 - Milano - Palazzo Borgazzi (1829) - Dettaglio - Foto Giovanni Dall'Orto, 31-Aug-2007.jpg|Keystone from the palazzo Borgazzi ([[Milan]], [[Italy]])
File:Barcelona. Generalitat Palace. Door to Carrer del Bisbe. C. 1638. Pere Pau Ferrer, architect. (18966422650) (cropped).jpg|Keystone much enlarged for decorative effect, and carrying a coat of arms, [[Barcelona]]
Image:Chapter House ceiling (crop 1).jpg|The York Minster Chapter House rib-vault ceiling with central and peripheral keystones 
File:Middle keystone in the Chapel of St. Anne in Malbork showing Jesus Christ.jpg|A [[boss (architecture)|boss]] depicting [[Jesus Christ]] decorates the keystone in the rib-vaulting at Chapel of St. Anne in [[Malbork]], 14th century.
Image:Toulouse Cathedral - Keystone 1.jpg|[[Boss (architecture)|Boss]]ed keystone in the ceiling of an apse chapel ([[Toulouse Cathedral]])
Image:Spain Andalusia Cordoba BW 2015-10-27 13-54-14.jpg|[[Horseshoe arches]] with equal-size [[voussoirs]] and [[keystones]], [[Mosque–Cathedral of Córdoba]], [[Spain]]
1993-1994-Giardino Giusti (Verona)-testo e photo Paolo Villa-nA2-tesi Accademia Belle Arti Bologna-portone di Palazzo Giusti.jpg|Main entrance Giusti's Palace Keystone, with rustic [[quoins]] and [[face]] of man
File:Bonn-Oberkassel Alte Evangelische Kirche Schlussstein.jpg|Dropped keystone on a German church
File:München-Altstadt Rumfordstraße 23 490.jpg|Doors and windows with decorated keystones, [[Munich]]
File:Tor der Casa di Giulio Romano.JPG|A range of plain but enlarged keystones by [[Giulio Romano (painter)|Giulio Romano]] for his house in [[Mantua]]
File:Mark Master Keystone.gif|The keystone is the symbol of the [[Order of Mark Master Masons]]
File:Navicular bone12.png|As a metaphor, the [[navicular bone]], shown in green, is known as the keystone of the foot<ref>{{Cite web |title=UpToDate |url=https://www.uptodate.com/contents/stress-fractures-of-the-tarsal-foot-navicular |access-date=2022-06-11 |website=www.uptodate.com}}</ref>
</gallery>