Antiquité & Moyen-Âge:
https://www.youtube.com/watch?feature=player_embedded&v=wCiglDeY4ew&list=PLotYiababMiwW2F86L96ga-q3Ib0Ze6Q7
Le contexte de 1830:
https://www.youtube.com/watch?list=PLotYiababMiwW2F86L96ga-q3Ib0Ze6Q7&feature=player_embedded&v=gXruWcK6Ya4
Le 20ème siècle:
https://www.youtube.com/watch?list=PLotYiababMiwW2F86L96ga-q3Ib0Ze6Q7&feature=player_embedded&v=-iDU17uaqVA
La situation actuelle:
https://www.youtube.com/watch?v=lTJ3hFguL-c&list=PLotYiababMiwW2F86L96ga-q3Ib0Ze6Q7&feature=player_embedded
