In the archives of Yale University, there's a 367-year-old bond from the water authority of Lekdijk Bovendams, in the Netherlands. And it's still paying interest.
Prof. Geert Rouwenhorst for his time and explanation
All the team at the Beinecke Rare Book and Manuscript Library
Michelle Martin (@mrsmmartin) for editing the interview
and Leendert van Egmond for telling me about the bond!
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