History of Zoology
A brief overview of zoological practices from 4500 B.C. to the 20th century.

History of Zoos
A summary of features of different zoo styles commonly used in the past and present.

Zoo and Aquarium History
The Bartlett Society offers historical articles discussing the Tower Menagerie, the Cincinatti Zoo, the Philadelphia Zoo, and the Washington Park Zoo.

Zoos: A Historical Perspective
Online exhibition by the National Zoological Park Library, Smithsonian Institution.

The History of Zoos
A brief overview offered by Zoo Check, an anti captivity project of the Born Free Foundation.