The 18th-century Venetian Maddalena Laura Lombardini-Sirmen had a complex international career as a protegee of Giuseppe Tartini, violin virtuosa, opera singer, and composer, yet original documents providing information about her are almost nil. This thesis assembles information about the life and works of this gifted woman musician and also provides a bibliographic study and analysis of her best known works: a set of six violin concertos (Opp . 2 and 3), Some 30 individual prints by three publishers--Dutch, French, and English--and 12 manuscripts have been located in 20 libraries of eight nations for these concertos, A discussion of Lombardini-Sirmen's style characteristics takes place within the context of concerto composition in the Lombardia-Venetia region of Tartini's influence and in that of the broader, European , pre-Haydn-and-Mozart sphere of influence, The discussion concludes that Lombardini-Sirmen's concertos belong to the high classical style period, In the Appendixes are a copy of Tartini's historic pedagogical "Letter" addressed to Lombardini-Sirmen (in an English translation by Charles Burney); a thematic index of the complete works by the composer and her husband, Lodovico Sirmen, A copy of the keyboard transcription of t he concertos, done by Tommaso Giordani and published in London circa 1773, is separately bound.