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A loggia (UK //, US //, Italian: [ˈlɔddʒa]) is an architectural feature which is a covered exterior gallery or corridor usually on an upper level, or sometimes ground level. The outer wall is open to the elements, usually supported by a series of columns or arches. Loggias can be located either on the front or side of a building and are not meant for entrance but as an out-of-door sitting room.
From the early Middle Ages, nearly every Italian comune had an open arched loggia in its main square which served as a "symbol of communal justice and government and as a stage for civic ceremony".
The main difference between a loggia and a portico is the role within the functional layout of the building. The portico allows entrance to the inside from the exterior and can be found on vernacular and small scale buildings. The loggia is accessed only from inside and intended as a place for leisure. Thus, it is found mainly on noble residences and public buildings. A classic use of both is that represented in the Mosaics of Basilica of Sant' Apollinare Nuovo of the Royal Palace.
Loggias differ from verandas as they are more architectural, and in form, decidedly a part of the main edifice in which they are located, while verandas are roofed structures attached on the outside of the main building.
A "double loggia" occurs when a loggia is located on an upper floor level above a loggia on the floor beneath.