== Usage ==
* Used in the crown section of brick bridges.
* A keystone can be made for any type of brick-based bridge: marble, pottery, rendered, rounded stone, sandstone, slate, or stone brick.
== See Also ==
* [[Bridge]]
* [[Brick bridge]]
[[Category:Marble items]]
[[Category:Slate items]]
[[Category:Pottery items]]
[[Category:Rendered items]]
[[Category:Rounded stone items]]
[[Category:Sandstone items]]
[[Category:Masonry items]]
[[Category:Stone items]]
[[Category:Bridges]]
[[Category:Babel/S]]