Many instruments originated during the Renaissance; others were variations of, or improvements upon, instruments that had existed previously. Some have survived to the present day; others have disappeared, only to be recreated in order to perform music of the period on <answer>authentic instruments</answer>. As in the modern day, instruments may be classified as brass, strings, percussion, and woodwind.
What has disappeared, then been recreated in order to perform music of the period?
authentic instruments