A number of years ago, probably around 2006 or 2007, I came across the website of the French Defense Historical Service and they had scanned blueprints for many of the French warships from the late 19th and early 20th centuries.
These drawings, all in TIF format were amazing. The amount of detail and the artistic writing and drawing techniques are some of the best I've seen.
The bad news is that the link disappeared and I have been unable to find the pages again. They may still be online somewhere, but finding them is extraordinarily difficult for me since I don't speak French.
The good news is that I was able to download a huge number of these drawings - more than 6,000 images. I will be adding these wonderful drawings here as I have time. They will be presented below and grouped by vessel type.