Frontier architecture

I'll just nip into Belgium...

Following my 8 November post about Stanstead, Quebec, I have had a blog comment from Alethia and a private e-mail from Watson. Both helpfully point out that the frontier between Belgium and the Netherlands is pretty similar (as the photograph suggests), particularly at Baarle-Nassau. Indeed, it is so complex that it merits a special Wikipedia entry. And now I vaguely recall stories about Belgian postmen driving to enclaves in the Netherlands to deliver letters. But although there may be houses with the frontier running through them, nobody has yet found me a public building in Europe that was deliberately constructed to straddle the frontier as a way of symbolising cooperation (as was the Haskell Free Library and Opera House).