One great gift idea for your grandpa could be a best-selling book on ethnographic studies, such as "Culture Counts" by Serena Nanda and Richard L. Warms or "Ethnographic Fieldwork: An Anthropological Reader" by Antonius C.G.M. Robben. Another thoughtful gift could be a membership to a museum or cultural center that offers ethnographic exhibits and events. You could also consider a unique piece of art, decor or jewelry from a local artisan that reflects his interest in ethnographic studies.
Or you can get him a star map with an important date you share.
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.