The Regensburg lecture or Regensburg address was delivered on 12 September 2006 by Pope Benedict XVI at the University of Regensburg in Germany, where he had once served as a professor of theology. It was entitled "Faith, Reason and the University — Memories and Reflections" (German: Glaube, Vernunft und Universität — Erinnerungen und Reflexionen). The lecture is considered to be among the most important papal statements on world affairs since John Paul II's 1995 address to the United Nations, and sparked international reactions and controversy.
In his lecture, the Pope, speaking in German, quoted a passage about Islam made at the end of the 14th century by Manuel II Palaiologos, the Byzantine emperor. As the English translation of the Pope's lecture was disseminated across the world, the quotation was taken out of context and many Islamic politicians and religious leaders protested against what they saw as an insulting mischaracterization of Islam.
Mass street protests were mounted in many Islamic countries, the Majlis-e-Shoora (Pakistani parliament) unanimously called on the Pope to retract "this objectionable statement". The Pope maintained that the comment he had quoted did not reflect his own views, and he offered an apology to Muslims. His statement has been included as a footnote in the official text of the lecture available at Vatican website:
In the Muslim world, this quotation has unfortunately been taken as an expression of my personal position, thus arousing understandable indignation. I hope that the reader of my text can see immediately that this sentence does not express my personal view of the Qur’an, for which I have the respect due to the holy book of a great religion. In quoting the text of the Emperor Manuel II, I intended solely to draw out the essential relationship between faith and reason. On this point I am in agreement with Manuel II, but without endorsing his polemic.