Thanks so much for this. I have gotten pretty good with the "advanced search" at Gallica, but I knew nothing of Madragore.
For the manuscripts in libraries in France other than the BnF, I have found a very good index called La Bibliothèque virtuelle des manuscrits médiévaux
I find I do a little better by using Google's "deep search" or inurl" feature, like this:
https://www.google.com/search?num=50&ne ... lt+Tournai
There are for France if anything too many indices. Another good one just for manuscripts is called Initiale.
Again I find I use Google deep search:
https://www.google.com/search?num=50&ne ... 9tramorphe
For Switzerland there is the excellent e-codices
https://www.e-codices.unifr.ch/en/searc ... rentPage=3
For Britain the British Library and the Bodlean are great, but I have found no index yet for all the smaller libraries.
For Germany there is the very comprehensive handschriftencensus, for manuscripts in any country, but only those in German. More are in Latin than in German and I have found no comparable index for Latin.
In this case I can't work the search feature at all, although the list of libraries is useful. I deep-search:
https://www.google.com/search?num=50&ne ... +Gebetbuch
Searching for phrase "Farb-Abbildung des Codex" limits the hits to items which have been digitized and placed online.
Otherwise every town and university in Germany has a library, but each one has its own quirks which must be learned, often for a reward of only one or two manuscripts without any pictures in them. Stuttgart however was well worthwhile.
The Austrian national library wants me to register and create an account. I haven't tried this yet. The library called Albertina lets me in without.
For Italy I have only the Biblioteca Estense
I have not found any other library, nor any national index.
Spain is a project: no results yet.
For the USA there is the Morgan library, and Harvard, and a library called Walters in, I think, Baltimore. There are some things that call themselves national indices but they don't work. I have not done well, yet, in the Met, which has so many decks of cards. Either the Library of Congress doesn't have all that much, or I can't figure out the index.
I have been in the national libraries of Poland and Hungary (which has those great B-order tarochhi) but without much found yet.