Rome c. 118-128 The Pantheon is one of the most important buildings in architectural history. Built by Hadrian, the greatness of this temple to the gods is difficult to appreciate from the exterior. A large Corinthian portico, 110 feet wide by 60 feet deep, is attached to a circular drum, with a small section of a dome appearing above. In fact the mass of the building was even more concealed in its original state, when a spacious colonnaded forecourt jutted out into the street.

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