Not many stock exchanges are topped by a 56m-tall spire formed from the entwined tails of four dragons. Børsen is one. Constructed at the eastern corner of Slotholmen in the early 17th century, its elegant Dutch Renaissance design features richly embellished gables and an eye-catching copper roof. Opened during the bustling reign of Christian IV, this still-functioning chamber of commerce is the oldest in Europe, though generally not open to the public.