How about getting him the Les Misérables deluxe edition soundtrack on vinyl? Many people consider the music to be the best part of the show, and vinyl editions can have a timeless quality to them. You could also consider getting him a Les Misérables book, such as a collector's edition, that is beautifully illustrated and features quotes and song lyrics from the show. Another option could be arranging a trip to see a live performance of the show, or perhaps even traveling to France to see the original settings for the story.
Or you can get him a star map with the date of your anniversary.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.