In 1885 Cosima announced that she would direct the 1886 festival. Her tenure as Bayreuth's director lasted for 22 years, until 1907. During that time she oversaw 13 festivals, and by gradually increasing the repertory established the "Bayreuth canon" of ten mature Wagner works. Her triumvirate of conductors—Levi, Richter and Felix Mottl—shared the musical direction until 1894, when Levi left. Richter and Mottl served throughout Cosima's years, joined by several of the leading conductors of the day, although Bülow resisted all offers to participate. In the course of her long stewardship Cosima overcame the misgivings of the hardline Wagnerites patrons who believed, like Nietzsche in his early years, that Wagner's works should not be entrusted to a non-German. Under her watch the festival moved from an uncertain financial basis into a prosperous business undertaking that brought great riches to the Wagner family.