Phrygian

late 15c., "native of Phrygia," region in ancient Asia Minor. As an adjective, "of, originating in, or relating to Phrygia," by 1570s. The Phrygian mode in ancient Greek music theory was held to be "of a warlike character." The Phrygian cap (1796) was the type adopted by freed slaves in Roman times, and thus it was subsequently identified as the cap of Liberty.