English royalty does this from time to time, through different means.

The Duke of Windsor (formerly Edward, Prince of Wales) is credited with popularizing and essentially "saving" or bringing the Fair Isle sweater to global fashion prominence in the 1920s.

Yes! I hadn't known about Prince Charles' involvement, but its popularity declined drastically in the 70s. Big revival now though.

Fascinating 'hobby drama' story about tweed here: https://www.reddit.com/r/HobbyDrama/comments/10nps05/fashion...