Final answer:
A colonnade is a series of columns and beams that envelops a space within a building and is open to the air on one side. It is commonly found in Egyptian, Greek, and Roman architecture, and is used to create visual rhythm and a sense of grandeur.
Step-by-step explanation:
A colonnaded or arcaded space within the body of a building but open to the air on one side, often at an upper story overlooking an open court, is called a colonnade. It is a series of columns and beams enveloping larger areas of space, and can be free standing or part of a larger structure. Colonnades are commonly found in Egyptian, Greek, and Roman architectural design, creating visual rhythm and a sense of grandeur. They are also used in contemporary architecture to provide stability and visual appeal in open spaces.