Antonio Vivaldi
Antonio Vivaldi (1678–1741) was a Venetian priest who was excused from saying Mass because of a chest condition (probably asthma) and spent his career instead as a violin teacher, impresario, and composer at the Ospedale della Pietà, a Venetian orphanage for girls that doubled as one of Europe's finest music schools. He wrote most of his work for the girls there — an extraordinary, strange institutional context for some of the most energetic music of the Baroque.
Vivaldi essentially codified the three-movement concerto form: fast–slow–fast, soloist against orchestra. He wrote 500 concertos, which led Stravinsky to joke that he hadn't written 500 concertos, he'd written the same concerto 500 times. The joke is unfair but contains truth: Vivaldi's forms are formulaic. What varies is energy, invention, and color. The Four Seasons — four violin concertos representing the four seasons — were published with descriptive sonnets and contain some of the earliest program music in the canon.
Bach copied and transcribed Vivaldi's concertos, rewriting them for organ, harpsichord, and orchestra. The influence moved one direction: Vivaldi to Bach, not the reverse.
StyleHigh Baroque virtuosity. Driving rhythmic energy, clear melodic sequences, ritornello form (theme returns between solo episodes). More kinetic than contemplative. Optimism as structural principle.
Listen: The Four Seasons (Le Quattro Stagioni), Op. 8 — start with Spring, but Winter is better.