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. Thanks to: 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! I'm at http://tomscott.com on Twitter at http://twitter.com/tomscott on Facebook at http://facebook.com/tomscott and on Snapchat and Instagram as tomscottgo