Ideas for something to buy that could become an heirloom (passed down in the family)?

I have some money from my great uncle who passed last year. I'd like to do something with it that isn't just temporary or materialistic. Ideally something timeless and could be passed down to keep his memory alive.

I've considered a bonsai though that would be a fraction of the money so it's still a possibility.

Any other ideas?

Ideas for something to buy that could become an heirloom (passed down in the family)?
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