Krewe of Rex — The King of Carnival

In 1872, a new krewe called Rex declared itself the official King of Carnival. Within a year, the organization had given New Orleans its Mardi Gras colors—purple, green, and gold—and its anthem, "If Ever I Cease to Love," a music-hall ditty transformed into the season's official song. Rex introduced the parade-with-theme format that every other krewe would copy, establishing a template that turned the final weeks before Lent into a choreographed civic pageant. The monarch is chosen each year from the city's old-line business elite. This is not subtext. It is the premise. Rex rolls on Mardi Gras morning, moving from Uptown toward downtown, and its arrival signals the culmination of Carnival—the establishment parade that closes out the season. What began as a formal assertion of cultural authority has endured as exactly that. The krewe's influence is legible in every color scheme, every themed float procession, every anthem sung on balconies across the city during Carnival. Rex formalized what had been improvisational, made official what had been local, and claimed the throne.