It was for Florentine public celebrations that Intermedii came into their own; several were organised by Machiavelli when he was part of the government of the Republic of Florence in the early 16th century, and the returning Medici adopted a policy of keeping the aristocracy occupied by involving them in productions.
This stage begins with Il commodo, from the Medici wedding in Florence of Cosimo I and Eleanor of Toledo in 1539,[4] where the four parts were morning, noon, afternoon, and night, represented with an elaborate mechanical artificial sun, with singing and dancing appropriate to each time.
Vasari's production for yet another Medici wedding in 1565 "embodied stupendous advances in engineering technique" with all the elaborate movements of scenery done without a curtain in full view of the audience.
[5] According to Roy Strong: "the designs for the 1589 intermezzi are crucial, for they are the earliest mass-disseminated illustrations of what became a norm throughout Europe for theatrical visual experience for the next three hundred years, the proscenium arch behind which receded ranks of side wings, the vista closed by a back-shutter.
The subject matter of the intermedio was usually a mythological or pastoral story, which could be told in mime, by costumed singers or actors, or by dance, or any combination of these.
[9] The actual content in terms of staging, music, instrumentation, presence of singers, actors, dancers, or mime was highly variable throughout the period, and sometimes all of these features were present.
Of the various intermedi that were performed, only the music to some parts of Il commodo (1539) and, through a 1591 printed edition by Cristofano Malvezzi, an almost complete version of La Pellegrina (1589) are known to have survived.
These intermedi do not follow what were believed to be the classical instructions, having an overture item, Vattene almo riposo, and a night time ending for tenor voice accompanied by four sackbuts and an extra coda the bacchanale, Baccho, Baccho, E U O E. The similar form which developed in France at the same time was called the intermède; it was more reliant on dance than the Italian version.