The Ultimate Fighting Championship (UFC) is the largest mixed martial arts (MMA) promotion company in the world that hosts most of the top-ranked fighters in the sport and produces events worldwide. Based in the United States, the UFC has seven weight-divisions and enforces the Unified Rules of Mixed Martial Arts. Dana White serves as the president of the UFC while Frank and Lorenzo Fertitta control the UFC's parent company, Zuffa, LLC. Inspired by vale tudo tournaments in Brazil, the UFC and the sport of MMA have roots in the ancient Olympic combat sport of Pankration. In 1993, the UFC held its first competition in Denver, Colorado. Showcasing fighters of different disciplines - including boxing, Brazilian Jiu-Jitsu, wrestling, Muay Thai, karate and other styles - the UFC sought to identify the most effective martial art in a real fight.