One idea could be to commission a custom piece of art specifically for your wife. You could reach out to local artists, or search online for artists whose style she is particularly fond of, and work with them to create a unique piece that she will cherish.
Another idea would be to take her on an art-focused trip or experience. Depending on your location, this could include visiting galleries or museums in a nearby city, signing her up for an art class or workshop, or attending a live art auction together.
Lastly, you could look into purchasing a limited edition print or signed work from one of her favorite artists to add to her collection. This could be something that she may not have been able to acquire otherwise, and would be a meaningful addition to her existing collection.
Or you can get her 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.