Throughout the history of music, composers have not only influenced and enriched the cultural life in their communities, but they have also influenced each other. The focus of this article is the influence of Antonio Vivaldi (1678–1741) on Johann Sebastian Bach (1685–1750) and specifically how that influence is manifest in Bach’s organ concerto transcriptions. We will explore Vivaldi’s concerto style and his L’estro armonico, opus 3.