In June, a great folkloristic and religious exhibition, the "Infiorata". A whole street (Via Italo Belardi) is covered with allegorical carpets of flowers and a masked parade walk on these, with medieval and traditional clothes realized by town's women. For more than 2 centuries on Sunday and Monday following Corpus Christus feast the Infiorata a most suggestive manifestation of art, pride of the artists of Genzano has taken place . Each year the artists suggestions must conform to a previously agreed upon theme, such as The Colours of Michelangelo, or The Designs of Bernini. In the spring it has recently become tradition to have a "mini Infiorata" made by the children from the local schools.
Poets and writers wrote about the Infiorata:
- Massimo d'Azeglio "...you see the fair, the people, the truly rare beauty of the town crowds of Roman, holiday makers from the nearby Castles....everything lively; and seen from the foot of the ascent it seems to be a magnificent carpet, that you regret to see spoilt by the feet of the procession".
- Richard Voss "One of the most beautiful Italian fairs is held in Genzano, the fair of flowers; the whole city seems to be a gigantic flower bed. A marvellous spectacle".
- Hans Christian Andersen "The whole street is a carpet of flowers.... Not even a breathe of air moves and the flowers lie on the ground as if they were heavy precious stones...".