“Dear friends, I am pleased to get in touch with you through Twitter. Thank you for your generous response. I bless all of you from my heart,” read the initial tweet.
The 85-year-old pontiff is tweeting in eight languages (Twitter handle is @Pontifex) and sent his first message from a tablet computer in the Vatican. He has since sent several other tweets.
During the day, Pope Benedict XVI is expected to respond to questions that include the hashtag #Askpontifex.
The Vatican has said the pope will use Twitter to engage followers of the Roman Catholic Church.
Photo Credit: Tadeusz Górny, via Wikimedia Commons