In the village of Unzue, located in Navarra, Leoncio Arizu was born to Saturnino Arizu and Juana Uriz. The meaning of the family name would be a sign of the importance oak would have in his life, as Arizu means "oak grove". In 1890, a seven-year-old Leoncio arrived in Argentina and settled in Mendoza, where he was met by his uncle Balbino, already involved in the wine business.
The very first vineyards owned by the Arizus, had vines of European origin and were incorporated so that the winery began form in 1901. Leoncio Arizu became the manager of the family winery. A year later, the family purchased steam-powered plowing machinery and hired highly-trained personnel from England.
Leoncio Arizu married Juana Larrea in 1922. The couple would have 5 children. Saturnino Arizu, Leoncio's son, became involved in the winery. Don Leoncio Arizu passed away, and left his children his greatest heritage: His passion for wine.
Years later, Saturnino and his children began the commercialization of the wines produced by the family: Luigi Bosca, a paradigm in Argentinean wines. In 1991 the original Luigi Bosca Winery, located in Luján de Cuyo, Mendoza, was renovated and enlarged.