From Time:
Benedict XVI's journey to Istanbul, formerly Constantinople, is laden with the wounds of history both ancient and painfully contemporary. The Pope's controversial Sept. 12 lecture in Regensburg, Germany, quoted a 14th century exchange between a Byzantine Christian Emperor and a Muslim intellectual in which the Emperor made some distinctly uncomplimentary observations about Islam. The Pope admitted that the Emperor's statement was brusque. But his point in reaching so far back into history was to demonstrate that problems between the Christian West and Islam long precede today's "war on terrorism."