The present disclosure provides monoclonal antibodies that bind α-Synuclein. In certain aspects, the antibodies preferentially bind to α-Synuclein fibrils over α-Synuclein monomer. In other aspects, the invention comprises a method of treating α-Synucleopathic disease in a subject, comprising administering any of the antibodies of the invention to the subject. In yet other aspects, the invention comprises methods of detecting α-Synuclein fibrils using any of the antibodies of the invention.