Final answer:
The structure described is best described as a loggia, which is an architectural feature that consists of a covered outdoor space with open sides, often supported by columns or arches.
Step-by-step explanation:
The structure described with two vertical columns that allow a view to other parts of the building is best described as a loggia. A loggia is an architectural feature that consists of a covered outdoor space with open sides, often supported by columns or arches.
For example, in the description of the loggia in the Pantheon, it mentions a portico with free-standing columns that is attached to a domed rotunda, creating an open space with two vertical columns allowing a view through to other parts of the building.
Other architectural terms mentioned in the descriptions include arcade, portico, and hypostyle, but loggia best fits the described structure.