A presentation from the 2011 annual conference for the North European Symposium for Archaeological Textiles (NESAT) explores the use of the bra in the 15th century. The paper by Beatrix Nutz is entitles Bras in the 15th Century? A Preliminary Report.
Nutz's presentation was based on archaeological finds from Castle Lengberg in Austria. She writes:
The textile finds consist of some hundred fragments as well as of few almost completely preserved pieces. Amid them were several nearly complete linen bras and fragments of corselettes, some rather coarsely made others more elaborately decorated with plaited borders and sprang worked parts. One of the bras even has a rather modern look.