and Diane Favro do suggest they were always intended to be covered with a decorative veneer which would then be patterned and painted even replicating expensive marble. With Roman craftsmen developing an interest to show uncovered polychromatic colouring at the start of the Augustan period where diverse usage of building materials emerged.

Material

While opus reticulatum used tuff to face opus caementicium core, Roman architects did not use the same tuff throughout their history changing which

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