The Pope's first tweet was sent back in June 2011, when the Vatican's website, launched its new and improved site, www.news.va. The Pope's tweet read in part "Praised be our Lord Jesus Christ! With my prayers and blessings, Benedict XVI.”
He used twitter again during Lent. Then for World Communications Day, the Pope made a reference to twitter, by saying that even short, concise messages, sometimes no longer than a Bible verse, can lead to provoking thoughts and deep reflections.