This book presents the first 50 years of the history of the Misano World Circuit "Marco Simoncelli". This historic track - the "Autodromo del mare" or seaside circuit - has witnessed unforgettable chapters in the history of motorsport, on two wheels and four, from the very first season in 1972 when the facility was inaugurated, through to the present day. The texts and the extraordinary photographs accompany readers along a thrilling exploration of the history of a circuit that has hosted the world's greatest riders and drivers from every decade. In a chronological narration that sets out from Emilia-Romagna's Motor Valley of the early 20th century, the book describes the principal races held at the Misano circuit, from the pioneering 1970s with the unforgettable duels on two wheels involving the likes of Giacomo Agostini and Renzo Pasolini to those on four wheels featuring Italian and international drivers. Then came the 1980s, with the motorcycling World Championship arriving on the Riviera together with F.2 and F.3 single-seaters and sports prototype and GT cars. The 1990s instead heralded the Superbike championship and the Super Turismo touring cars. The new millennium has seen the circuit develop into an avant-garde facility on all fronts, capable of hosting international events and prestigious collateral events. The volume is edited by Marco Montemaggi, coordinator and author of numerous books on Italian industrial culture and, in the motor industry, former director of the Ducati Museum and former scientific curator of the Motor Valley project. A scientific committee made up of highly experienced authors and personalities such as Andrea Albani, Davide Bagnaresi, Marco Masetti, Luigi Rivola and Sergio Remondino contributed with passion to the creation of the volume, assisted by many of the protagonists of Italian motorsport, always close to the Misano World Circuit.