In classical architecture, a colonnade is a long sequence of columns joined by their entablature, often free-standing, or part of a building. Paired or multiple pairs of columns are normally employed
Colonnade at the Belvedere on the Pfingstberg palace in Germany
The colonnade of Amenhotep III at the Luxor temple
The Stoa of Attalos in the reconstructed Ancient Agora of Athens
The Great Colonnade at Palmyra, Syria
An arcade is a succession of contiguous arches, with each arch supported by a colonnade of columns or piers. Exterior arcades are designed to provide a sheltered walkway for pedestrians; they include
Colonnade
…by a colonnade. The longest colonnade in the United States, with 36 Corinthian columns, is the New York State Education Building in Albany, New York. Arcade Cloister…
Norman blind arcade, Ely Cathedral
Arcades of the Colosseum (AD 70s) from the outside
Arcades inside the Mosque of Uqba, also known as the Great Mosque of Kairouan, in Tunisia (670). There is no vaulting; the arches are bridged by wooden beams
These arcades in Córdoba were begun in the 780s; Some are topped by beams, others by barrel vaults.