Carl Hagenbeck
Carl Hagenbeck (1844 - 1913) was a German merchant who specialized in wild animals and supplied animals to both European zoos and to P. T. Barnum. He is credited with creating the modern zoo with animal enclosures without bars. He founded the Tierpark Hagenbeck, the most successful private zoo in Germany in 1907. Outside of running animal zoos, he was a pioneer in the displaying of human beings in human zoos. He died in 1913 in Hamburg from a snake bite and following his death his sons Heinrich and Lorenz continued his work.