Hyderabad has continued with these traditions in its annual Hyderabad Literary Festival, held since 2010, showcasing the city's literary and cultural creativity. Organisations engaged in the advancement of literature include the Sahitya Akademi, the Urdu Academy, the Telugu Academy, the National Council for Promotion of Urdu Language, the Comparative Literature Association of India, and the Andhra Saraswata Parishad. Literary development is further aided by state institutions such as the State Central Library, the largest public library in the state which was established in 1891, and other major libraries including the Sri Krishna Devaraya Andhra Bhasha Nilayam, the British Library and the Sundarayya Vignana Kendram.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): In what year was the biggest public library in Hyderabad created?
1891