589 - 632 : Koran revealed to Muhammad; it shares stories with Judeo-Christian texts.
711 - 718 : Arabs conquer Spain, which becomes center of commerce and culture.
1096 - 1291 : Christian Europe launches the Crusades against Islam.
1453 : Ottoman Turks take constantinople, capital of Orthodox Christianity.
1493 : King Ferdinand drives the Moors from Spain and next expels the Jews.
1683 : The Ottoman siege of Vienna fails, marking the end of its Islamic expansion.
1965 : Nostra Aetate
2001 : Pope John Paul II is first Pontiff to visit a mosque, in Damascus, Syria.
Sept. 2006 : Pope Benedict XVI links Islam to violence, igniting debate and protest.