How about an original vinyl record of Beethoven's Ninth Symphony or a book about his life and work? You could also buy her/him a biography of Beethoven or a DVD of a performance of his music. If they already have everything related to Beethoven, you could consider gifting them a concert or opera tickets featuring his compositions. Alternatively, you could find a local music shop that offers Beethoven-themed merchandise such as t-shirts and posters.
Or you can get her/him a star map with the date when she/he was born.
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.