You're overdue, I think, for a list of accumulated links... so I can close a few of the gazillion open tabs again. 

You can read something about the history and technique of spinning gold threads here

Late-medieval leather and textile finds, together with window glass fragments and toys, have been found in Berlin. The finds date to the 15th century, and the large amount of well-preserved organic materials promise very, very interesting results. You can read a German-language article about the find here.

The Internet Archive has so, so many different books and other written sources, it's quite overwhelming. They include a very large collections of cookbooks. The Modern Met has put together some recommendations for you here.

Here you can have a look at a very rare type of illuminated manuscript - the oldest income register of a secular manor, the Codex Falkensteinensis. It dates to the second half of the twelfth century, and its illustrations include people doing agricultural work - which is always nice if you are looking for sources for "normal" people.

You can find nice lace patterns for knitting here - the "Kelpies Hexagon Designs". 

If you're interested in loop braiding, the LMBRIC archives are now again available - via this website here.