First off I wanted to pass on some helpful websites for research into theatre history and costume history.
This is based on a book of plates that is used for reference by costume designers. Most of the artwork is from the 1800's so it is a "secondary" source. A "primary" source would be actual existant clothing and arts from the actual time period. The "secondary" source is considered "biased" as it is an artist's interpretation and therefore not as accurate. Still it is often all that is available.
Extensive catalog of art history resources on the web.
Just what you'd expect.
Greek theatre history; somewhat simplified but still useful.
That's all for now.
"Let the rituals be rightly performed with joy and beauty!"