The Palladian window or “Palladio motif” is Palladio’s elaboration of this, normally used in a series. It places a larger or giant order in between each window, and doubles the small columns supporting the side lintels, placing the second column behind rather than beside the first. This is introduced in the Basilica Palladiana in Vicenza, where it is used on both storeys; this feature was less often copied. Here the openings are not strictly windows, as they enclose a loggia. Pilasters might replace columns, as in other contexts. Sir John Summerson suggests that the omission of the doubled columns may be allowed, but “the term ‘Palladian motif’ should be confined” to cases where the larger order is present.

Description sourced from Wikipedia. Images sourced from Wikipedia and Blindsgalore.