Decorative architectural frame of the entrance doors, also internal doors, in the churches, castles, town halls, richer tenements. The decorations were architecturally different, depending on the period. In ancient Greece it was a band, while in ancient Rome a frieze, sometimes a portico. In romanesque times, the portal was a semicircular archivolta with several rows of arches going back into the wall and closed with tympanum over the entrance. Arches were usually full of ornamental carvings. Support of arches was shaped in the form of pillars, columns or pilasters. During the gothic period, the shape of the archivolts was changed from semicircular to pointed arch.

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