Circumstances then warrant that they seek a larger site for a new novitiate, school and winery. In 1930, they acquired, from Colonel Theodore Gier a property in Napa Valley which had an extensive vineyard with a three-storey building. The winery then expanded and produced award winning Mont La Salle wines.

Brother John F.S.C. and Brother Timothy F.S.C. contributed considerably to the success of the winery during this period. Brother John's vision and energy resulted in the winery's rise to eminence as one of California's leading wineries while Brother Timothy became a legend as a world-renowned Wine Master and heart of the industry.

Brother Timothy, born Anthony George Diener on 28 November, 1910 was raised in California where he attended two high schools operated by the Christian Brothers. He joined the Brothers’ Order at the age of 26 and received his training at the Novitiate in Martinez, C.A. and at St. Mary’s College, Moraga where he graduated at the age of 29. He became a science teacher at the Brothers’ schools in Sacramento and in Berkeley in the early 30s.

With the repeal of Prohibition in 1933 came a new calling for this young teacher. He was then transferred to Mont La Salle in Napa Valley to become the “wine chemist” to expand the Order’s wine making activities. You see, the Christian Brothers had grown grapes and made sacramental and medicinal wines during the Prohibition, but now they decided to branch out to commercial production of wine and brandy.

Brother Timothy was not the stereotypical roly-poly monastic figure. According to his friend, Brother Arnold, he was a bear of a man. He often quipped about why he was given the Wine Master assignment – “ possibly I was big, strong and young and all that.” With his huge hands, he could easily be passed for a football player. He loved to tinker with plants, especially a fine orchid collection. Aside from that, he had little interest in worldly goods. Those who knew him said he was a people’s man, gregarious and always ready to share information and a good drop of wine. He was often featured in advertisements and promotional materials and his smiling face became one of the most familiar images for wine consumers across the country.

When asked if he saw the conflict between making wine and belonging to a religious order, He said, “I’ve always been aware of the danger of abuse of wine. I’ve always taken the attitude that everything one does should be in moderation. We should make judicious use of God’s creatures and blessings. All I can say is that a little wine in moderation seems to have been good for me.”

Hobby-wise, he is well known for his corkscrew collection now housed at the Culinary Institute of America, formerly the Christian Brothers’ Greystone Winery. He was an officer of an international society of corkscrew collectors and made it a point to attend meetings in various parts of the world.

Brother Timothy spent the next 54 years in Napa Valley as Cellar Master for Mont La Salle Vineyards, retiring in 1989. At one time, the company controlled the largest acreage of vineyards in the Valley. Together with a few associates, Brother Timothy founded the Napa Valley Vintners’ Association, dedicated to promoting the natural advantages of the region and has had great success in making the area world famous. He was the organization's President in 1952, 1953 and 1962.

The legendary wine maker succumbed to a heart attack in the retirement home for the Brothers at Mont La Salle on the morning of 30 November, 2004 at the age 94.  Brother Timothy was buried at the Mont La Salle Brothers cemetery in the Napa Valley. He was survived by a brother, Joseph, in southern CA; and by several nieces and nephews, grandnieces and grandnephews.