In 1883, De Müller received the Ecclesiastical Certificate of liturgical purity. It was the first winery in the world to obtain the title of Pontifical Suppliers of the Holy See.

The first evidence of wine production dates back to some millennia before Christ. The religious use of wine was a reason for its rapid expansion and also for its survival. The mass wine served in the chalices of the country that consumed the most liters per capita from the papacy of Pius X to that of John XXIII.