Fact: Paris is the Western European capital that saw the greatest number of foreign armies marching through its streets.
52BC - Roman conquest
486 - Frankish conquest
(those 2 don't really count)
845 - (Brief) Viking occupation
885 - Viking occupation
1358 - Navarrese occupation
1420 - English occupation
1590 - Spanish occupation
1814 - Russian, Prussian and Austrian occupation
1815 - British, Prussian and Austrian occupation
1871 - Prussian occupation
1940 - German occupation