I highly recommend the China National Silk Museum in Hangzhou, which was the center of the imperial silk industry:
https://en.wikipedia.org/wiki/China_National_Silk_Museum
https://web.archive.org/web/20170907005855/http://en.chinasi...
It has complete royal robes ~1,000 years old, and a few damaged garments more than 2,000 years old IIRC.