San Colombano, also known as San Colombana or Colombana bianca, is an ancient white grape variety of Italian origin, historically associated primarily with Tuscany. Its presence is documented as far back as the 14th century, and tradition links it to the hills around Pisa, from where it spread to other areas of the region and, under sometimes different local names, to the Piacenza and Pavia areas and the hills of San Colombano al Lambro. The vine is of medium vigour and has small leaves, generally trilobed or slightly pentalobed, with a characteristically blistered surface and light anthocyanin pigmentation. The bunch is medium-sized, conical-pyramidal in shape and rather airy; the berries, which are sub-round, have a firm, golden-yellow skin, crisp and juicy flesh, and a simple yet pleasant flavour. These characteristics ensure good resistance to rot and a reasonable suitability for storage. When vinified as a white wine, it produces straw-yellow wines that are delicate and fresh, with aromas of light-coloured flowers, white-fleshed fruit and a pleasant savoury note; the structure is generally light, but can acquire greater intensity through maceration, drying or ageing. Traditionally used as a table grape as well, it lends itself to the production of dry wines, passito wines and vinsanto, in which it develops ripe notes of dried fruit, honey and almond.