The part of the Royal Netherlands Meteorological Institute that approved and certified the nautical lights, compasses and instruments in Rotterdam closed in 1988.
Rotterdam | Dragons' Den | Den Watts | Unter den Linden | Erasmus University Rotterdam | International Film Festival Rotterdam | Ahoy Rotterdam | Den Helder | Sparta Rotterdam | Dragons' Den (UK) | Cole Haan | The Den | Deutschland sucht den Superstar | Den Nationale Scene | Den | Rotterdam School of Management | Den Haag Hollands Spoor railway station | Wu Den-yih | The Lyon's Den | Rotterdam Blitz | Joop van den Ende | Alphen aan den Rijn | Walter van den Broeck | The Den (television) | Samuel van den Bergh | Rotterdam Convention | Remi Van den Broeck | Port of Rotterdam | Ninja in the Dragon's Den | Michiel van den Bos |