Which European countries capitals are nearest each other?

Andorra la Vella (Andorra) and Montpellier (France) - a mere 89.41 miles apart

Bern (Switzerland) and Milan (Italy) - separated by just 92.65 miles 

Brussels (Belgium) and Cologne (Germany) - 105.41 miles. 

Copenhagen (Denmark), Malmö (Sweden), and Oslo (Norway) are all within around 310 miles

Vaduz (Liechtenstein) and Zurich (Switzerland) - 57.05 miles (Vaduz can actually be seen from downtown Zurich!)