In architecture, a boss is either a decorative knob on a ceiling, wall or sculpture, or a prominence on an ashlar. == Decorative boss == Bosses can often be found in the ceilings of buildings, particularly at the keystones at the intersections of a rib vault.
In architecture, a boss is either a decorative knob on a ceiling, wall or sculpture, or a prominence on an ashlar. == Decorative boss == Bosses can often be found in the ceilings of buildings, particularly at the keystones at the intersections of a rib vault.
Source: Wikipedia "Boss (architecture)" · CC BY-SA 4.0
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