How about commissioning a one-of-a-kind mosaic art piece for him? You could hire a local mosaic artist to create a custom piece based on your husband's tastes and preferences. It could be a portrait of the two of you, a landscape, or anything else that he would appreciate. Alternatively, you could purchase a pre-made mosaic art piece or kit so that he can create his own masterpiece. Another idea could be to take a trip to a place famous for mosaic art like Ravenna, Italy and arrange for a mosaic art workshop or class for him to take while you're there.
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.