Rossetto is the traditional name used in Lazio to refer to Trebbiano Giallo, a white grape variety associated primarily with the Castelli Romani, the province of Rome and the Tuscia region around Viterbo. Its presence has been documented since at least the 19th century, whilst earlier descriptions of Trebbiano with golden berries date back to 1825. The name refers precisely to the golden-yellow colour that the skin takes on when ripe. The vine is vigorous and has medium-to-large, pentagonal leaves, generally five-lobed, with a green, slightly blistered upper surface and a paler, slightly spiderweb-like underside. The bunch is medium to large, cylindrical-conical, sometimes winged, compact or semi-loose; the berry is medium-sized, spherical, with a medium-thick skin that is very pruinose and golden-yellow in colour, loose flesh and a simple flavour. Rossetto is grown in various areas of Lazio and is also found in Puglia, Lombardy and Veneto. The wine is characterised by a yellow colour of varying intensity, a delicate and finely aromatic bouquet, and a harmonious, savoury, dry palate, sometimes featuring a pleasant hint of bitterness. Generally light- to medium-bodied, it offers a well-balanced drinking experience and can develop greater complexity with brief ageing. An interesting historical fact is its traditional use in the production of wines made from raisined grapes, such as Vino Santo della Tuscia.