Karl Heinrich Ulrichs (28 August 1825 – 14 July 1895) was a German lawyer, journalist, and author who is seen today as a pioneer of the modern gay rights movement.
Source: Hubert Kennedy, Karl Heinrich Ulrichs: Pioneer of the Modern Gay Movement, 2nd ed. (Concord, Calif.: Preemptory Publications, 2005), frontispiece. License: CC-PD-Mark PD-Art (PD-old-100)