Francesco Antonio Vallotti (1690-1780) was an Italian composer, music theorist, and organist, primarily recognized for his contributions to the Baroque and early Classical music periods. Vallotti was born in Padua and later became a prominent figure in Venice, where he influenced both performance practices and theoretical approaches to music. Vallotti is best known for his treatise, "Risoluzione dell'armonia" (1739), which presented innovative ideas on harmony and tuning systems, particularly advocating for a well-tempered tuning that influenced later composers. His compositions include sacred music, chamber works, and keyboard sonatas, with notable pieces such as his "Sonate per Gravicembalo" and various motets and liturgical music that reflect the stylistic transitions of his time. His impact on music extends through his pedagogical efforts and theoretical advancements, paving the way for later developments in harmony and composition. Vallotti's work contributed to the evolution of instrumental music and influenced contemporaries, bridging the gap between the Baroque and Classical eras. His theoretical writings remain a reference point for understanding the musical practices of the 18th century.