This book is a full-length biography in English of Giovanni Battista Viotti (1755–1824), one of the great violinist-composers in the history of music, and arguably the most influential violinist who ever lived. He rose from humble origins as a blacksmith's son in a village near Turin, Italy, and early studies with Gaetano Pugnani, to a triumphant international career, particularly in Paris and London. His multifarious career as concert performer, composer, teacher, opera theater director, and impresario was played out against the backdrop of a dramatically changing world: from the ancien régime patronage of an Italian prince and the Queen of France, Marie Antoinette, to the commercial and box-office–centered institutions of the early 19th century. Viotti's life was intensely dramatic. He knew tragedy as well as success: he was forced to flee the French Revolution, he was exiled from England for an extended period, his attempt to establish himself in business met with failure, and he died heavily in debt. His correspondence with an English family, the Chinnerys, with whom he was intimately associated for the last half of his life, provides an unusually revealing glimpse into his personal life. Viotti's biography is not without its mysteries, among which is his renunciation, twice in his life, of public performance. This study is based on extensive documentary research, much of it here revealed for the first time. Viotti's works are considered in the context of his life. Eleven appendices include translations of various Viotti-related archival documents, and additional information on Viotti's siblings, his places of residence, his violins, his unfinished violin method, and financial matters.