Father Célestine Guynemer de la Hailandière, Bishop Bruté's vicar general, was consecrated as Bishop of Vincennes on August 18, 1839. Among the new bishop's most significant achievements were completing Saint Francis Xavier Cathedral, which he consecrated on August 8, 1841, and construction of a library at Vincennes to house Bishop Bruté's collection of more than 5,000 books and religious documents. Under Bishop Hailandière's leadership the diocese also expanded its services. The Sisters of Providence established its order within the diocese and the Brothers of the Holy Cross to established schools for boys. Father Edward Sorin, founder of the University of Notre Dame, and Mother Théodore Guérin, founder of Sisters of Providence of Saint Mary-of-the-Woods, also joined Bishop Hailandière in Indiana. Despite Bishop Hailandière's efforts, Indiana's population grew slowly and the institutions he helped to establish experienced many problems. In 1843 the diocese was divided and the Illinois portion became the Diocese of Chicago. Bishop Hailandière resigned in 1847.