The "Azienda Agricola Cappella Sant'Andrea" is located in the municipality of Casale (San Gimignano, province of Siena) in the Italian region of Tuscany. The farm was acquired by the Leoncini family in 1959. Today it is managed by Flavia Del Seta and Franceso Galgani. In 1990 a new wine cellar was opened. The vineyards cover eight hectares. They are planted with the white Vernaccia di San Gimignano and the red Sangiovese, Ciliegiolo, Colorino del Valdarno and Merlot. The cultivation is carried out according to the guidelines of organic viticulture. According to the philosophy of the couple, "the creation of a vineyard is like a marriage with the earth or the soil".
The premium wines of the house are two DOCG white wines Vernaccia di San Gimignano. The "Rialto" is fermented after ten hours of maceration in stainless steel tanks and matures on the fine yeast for a year. The "Prima Luce" is aged in barriques for another year after two weeks of maceration and one year of ageing in terracotta. 45,000 bottles are produced annually. Half of them are exported, mainly to Germany, Belgium, France and the USA. The winery is a member of the Consorzio della Vernaccia, Biodistretto San Gimignano and FIVI (Federazione Italiana Vignaioli Indipendenti).