28-30 May. The annual flower festival, or "infiorata", takes place at Genzano south of Rome from 28-30 May.
The ancient festival, now in its 238th edition, is held each year on the weekend of Corpus Domini, which this year is Sunday 29 May.
The festival features up to half a million petals, blooms and seeds which are used to carpet the town's main street with spectacular floral illustrations.
For full details see Genzano website.