“Triumphal Arch: Originating in Rome by the 2nd century B.C., these freestanding monumental gateways were erected to commemorate victorious generals. Sometimes serving as city gates, these arches were often merely decorative and richly adorned with sculptural elements. The two main types include one with a single archway and another flanked with smaller arches to the sides. The triumphal arch form was popularized anew during the Italian Renaissance.”
Excerpted from: Diamond, David G. The Bulfinch Pocket Dictionary of Art Terms. Boston: Little Brown, 1992.