The last Pope to resign was Gregory XII in 1415. And he didn't Tweet.
That's a long time ago.. It's also very debatable in Catholicism whether a Pope should actually be able to quit.. This papal resignation comes right before the Lenten and Easter season in the Church..
There are some perhaps shocked by this morning's news. But no doubt the power brokers in the 'holy' rooms of Rome were ready. And with this resignation a chance now to rule the Church. They will gather...the white smoke will billow. There may already be a Pope chosen secretly by the Cardinals, who maybe knew this quit would come...