Yes, as noted by ialmisery, the letter was presented at the Patriarchal Church of St. George at the Phanar, in Istanbul, which, when it was referred to as Constantinople, was the capital of the Byzantine Empire and the Ottoman Empire. Since the establishment of the so called Turkish Republic, Ataturk established his capital at Ankara. Typical of the RC's, though, considering St. Andrew the patron of the Orthodox Church probably because he is the patron of the Church of Constantinople.
But, I do agree with the substance of His Holiness' message. Both the Eastern Orthodox Church and the Roman Catholic Church should acknowledge that one thousand years of separation has resulted in differences in doctrine and theology, but acknowledge the 1,000 year history of their essential oneness in faith, and should establish an entity that would jointly proclaim the message of Christ to the world, along with other Trinitarian Christian denominations, if there are any left who don't ordain women and homosexuals. The world needs the message of Jesus Christ more so today than ever, a world overwhelmed by hedonism and the Moslem heresy.