Manuscripts of American architect Frank Lloyd Wright contain his working drafts and final versions of his writings (published and unpublished), lectures, and talks dating from 1894 until his death in 1959. The collection consists of approximately 2,785 drafts amounting to over 31,000 sheets. The manuscripts range from handwritten drafts to heavily corrected typescripts and galley proofs. Included in this comprehensive collection of writings are a large number of unpublished pieces which expand upon Wright's published ideas on architecture, art and aesthetics, and which provide further insights into the architect's views on politics, religion, morality and various other topics.