The New York Public library has put online its collection of color military plates. Most are hand colored block prints. The collection of Mexican Uniforms 1826 – 1906 could come in handy as a painting guide for the Texas Rebellion and the US – Mexican War, as well as the Maximilian period.
Painting Guides
British Uniforms 1066 – 1900
The New York Public Library’s digital holdings have an amazing collection of color plates of British uniforms from 1066 – 1900. These are great painting guides.
Uniforms of Byzantium Through 1453
The New York Public Library Systems Digital Library has digitized images of thousands of plates, prints and paintings, including these of the uniforms of Byzantium through 1453.
English Civil War Unform Guides
Here are a couple of short guides to English Civil War Royalist and Parliamentarian uniforms.
Viking Painting Guide
Kurtis Brown offers a one-page painting guide to Vikings.
Note: the link above is dead, and an email to Kurtis bounced. So I went to the Wayback Machine and retrieved a copy of the page. It is preserved below for posterity.