A loggia is a covered exterior gallery or corridor, usually on an upper level, but sometimes on the ground level of a building. It is an architectural feature that has been used for thousands of years, particularly in Italy, Greece, and Spain. Loggias have columns or arches on the open side and are open to the elements because their outer wall is only partial. They differ from verandas in that they are more architectural and, in form, are part of the main edifice in which they are located, while verandas are roofed structures attached on the outside of the main building. Loggias can be found on large public buildings, but they are also a luxurious addition to residential properties.

Benefits of a loggia include expanding livable space, providing a perfect shady and private spot for alfresco dining, offering a seamless transition from indoor to outdoor space, and adding an elegant and grand architectural feature to a home. Loggias often have a more formal feel than a screened porch or patio, so decor that fits the bill is recommended.

Loggias have been used for thousands of years, and their origin is from the mid-18th century from the Italian word for "lodge". They were often used in conjunction with a public square, as in the Loggia dei Lanzi in Florence, Italy. Loggias have evolved over time, and in contemporary architectural, interior, or landscape design, the word loggia sometimes ends up being whatever the designer—or client—wants it to be.

Loggias are lovely, but they wont shelter you or your furnishings from wind and other elements of weather. In addition, loggias require the same level of cleaning and maintenance as do structures like porches, covered patios, and decks.