He also offered his "best wishes" to those selecting the Pope's successor:
"On behalf of Americans everywhere, Michelle and I wish to extend our appreciation and prayers to His Holiness Pope Benedict XVI. Michelle and I warmly remember our meeting with the Holy Father in 2009, and I have appreciated our work together over these last four years.
"The Church plays a critical role in the United States and the world, and I wish the best to those who will soon gather to choose His Holiness Pope Benedict XVI’s successor."
So, we're all shocked at the resignation of the Pope, but what happens next?
Pope Benedict XVI has made the announcement that he will resign as the head of the Roman Catholic Church due to his "advanced age."
Who will follow in Pope Benedict's footsteps? Is it time for an African pope?