Contemporary communication studies now refer to public speaking as a form of communication.
the baroque composers were
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capitals - paired columns which usually have a square top and round base. these usually depict biblical scenes or legends of local saints.
latin cross - most churches or abbeys would follow the shape of a latin cross. the latin cross is a universal symbol of christianity.
piers - columns were replaced with piers which were often used to provide support to arches. the piers are usually cruciform (cross-like) in shape when they intersect two big arches.