How about getting him a printmaking class or workshop? That way, he can learn new techniques and improve his skills. You can also get him a printmaking toolset, so he can make prints at home. Another great idea is to commission a custom print from a local printmaker based on a photo or image that is significant to the two of you. This would be not only a thoughtful and personal gift but also a unique and one-of-a-kind piece of art.
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.