The city is most noted as the home of the Autodromo Enzo e Dino Ferrari which formerly hosted the Formula One San Marino Grand Prix (the race was named after the nearby independent republic of San Marino, as Monza already hosted the Italian Grand Prix), and the deaths of Formula One drivers Ayrton Senna and Roland Ratzenberger at the circuit during the 1994 San Marino Grand Prix. The death of Senna (three-times world champion) was an event that shocked the sporting world and led to heightened Formula One safety standards.