Porticus
A portico (from Italian) is a porch leading to the entrance of a building, or extended as a colonnade, with a roof structure over a walkway, supported by columns or enclosed by walls. This idea was widely used in Ancient Greece and has influenced many cultures, including most Western cultures.
Some noteworthy examples of porticos are the East Portico of the United States Capitol, the portico adorning the Pantheon in Rome and the portico of University College London.
Bologna, Italy, is famous for its porticos. In total, there are over 45 kilometres of arcades, some 38 in the city center. The longest portico in the world, about 3.5 km (2 mi), extends from the edge of the city to Sanctuary of the Madonna di San Luca. In Turin, Italy, porticos stretch for 18 kilometres.
Palladio was a pioneer of using temple-fronts for secular buildings. In the UK, the temple-front applied to The Vyne, Hampshire was the first portico applied to an English country house.