What kind of piece was the four season by vivaldi?

"The Four Seasons" by Antonio Vivaldi is a set of four violin concertos, each representing a different season of the year: spring, summer, autumn, and winter. Composed in 1723, it is part of Vivaldi's larger work "Il cimento DELL'armonia e DELL'inventione." Each concerto is characterized by vivid musical imagery that captures the essence of its respective season, using innovative techniques and lively rhythms. This work is a prime example of program music, where the music is intended to evoke specific scenes and emotions associated with each season.