April 29th and 30th, 2018 there was a Gothic Lolita History Pop-up Museum exhibit in Harajuku run by a private collector. There were pieces from 1980 – 2005, and a focus on early lolita history.
You can see photos / commentary from the host here: https://twitter.com/i/moments/991125450972839937
Here is a video tour from HARAJUKU KAWAII CHANNEL on youtube. It features one of the hosts explaining how she came to own some of the pieces, what they are, when they are from and some of the history of the fashion. Some of the pieces are one of a kind, and many of them are exceptionally rare due to their age