Abraham Lincoln | Otto von Bismarck | Abraham | Otto | F. Murray Abraham | Battle of the Plains of Abraham | Otto III | Abraham Ortelius | Otto Piene | Otto I, Holy Roman Emperor | Otto I | Otto Preminger | Abraham Maslow | Otto II | Otto Dix | Arthur Abraham | Abraham Laboriel | Otto Natzler | Otto II, Holy Roman Emperor | Otto Binder | Abraham Joshua Heschel | Otto Skorzeny | Otto Schenk | Otto of Brunswick | Otto Kerner, Jr. | Abraham ben David | Spencer Abraham | Otto Steinbrinck | Otto Kerner | Otto IV, Holy Roman Emperor |
The project was initiated in September 1900 by the psychology professor Carl Stumpf, after the visit to Germany of a music theater group from Siam, which Stumpf recorded on Edison cylinders with the assistance of the Berlin physician Otto Abraham.