Where: Paris, France Start of construction: 12th Century End of construction: 18th Century Most important renovations: 20th & 21st century Accessible: yes Important fact: the castle complex consists of a 52-meter high keep (the tallest in Europe), 1100 meters of wall, a chapel, several pavilions and a 40-meter high entrance gate. Some other gateways were demolished in the past. On October 15, 1917 Dutch Mati Hari was executed on the castle grounds on charges
of espionage. http://www.chateau-de-vincennes.fr/