The American Ballet Theatre's Online Ballet Dictionary is unique interactive resource with 170 terms from the Technical Manual and Dictionary of Classical Ballet, which are then demonstrated by ABT Company dancers.

500 Years of Italian Dance: Treasures from the Cia Fornaroli Collection.

eBook provided through Project Gutenberg. This book is a collection of images of people engaged in dance. It was originally authored by "An Antiquary" in 1911. The pictures provide a sampling of dancing figures from ancient times until the early 20th Century. Several cultures are represented. Many of the images are derived from woodcuts, while others are drawings.

Search Google images for photographs and images of dance costumes; use Google's Advanced Search to limit results to .edu (educational institutions).

A brief collection about the history of Social Dance in America, presented by the American Antiquarian Society.

Everything to do with European dance from the 15th to early 17th centuries.

Created at UC Santa Barbara, VOS provides suggested links to information on traditional, modern, and international dances. Topics include history, education, choreographers, and dance companies.

Dance History playlist via Youtube.