[3][4] The appearance of the Palazzo Caprini's main facade is known from an etching published by Antoine Lafréry and a partial sketch attributed to Andrea Palladio.

The upper floor had windows divided by coupled columns of the Doric order, surmounted by a complete entablature.

The decorative inclusion of large rusticated voussoirs and keystone instead of a lintel over the flat top of the lower rectangular openings in the end shop fronts was also a device with a long future.

The apparent strength of a blind arched arcade with emphatic voussoirs on the rusticated ground storey gave reassuring support to the upper storey's paired Doric columns standing on rusticated piers, set against a smooth wall.

The many buildings providing variations of the design include Somerset House in London[6] and the Louvre Colonnade.