CHICAGO (CBS) — This St. Patrick’s Day will go down as a memorable one for billions of Catholics worldwide. It’s the first Sunday for newly picked leader, Pope Francis.

The day began with a mass at the Church of St. Ann in Vatican City.

The Pope then did his first Angelus, from the balcony of his apartment overlooking St. Peter Square.

An estimated 100,000 people waited down below to be a part of blessing.

Many Chicago Catholics got up to watch the day’s events on television, despite the 4:00 a.m. start time.

“He certainly has shaken off the pre-game jitters. Looked like he was enjoying himself and it was, I think a momentous time period for the Catholic Church,” said Tom O’Boyle, a Sunday morning parishioner at Old St. Patrick’s Church in Chicago.

“I think it is a big day not just for the Pope, but other areas of the world, especially from Argentina,” said Old St. Patrick’s Parishioner, Natasza Juraszek.

Pope Francis is the first Jesuit and only Latin American to serve as head of the Catholic Church, selected Thursday by his peers– cardinals from around the world.

The next highlight comes Tuesday, when Pope Francis has his installation mass.

The Pope will then receive his papal regalia, which includes a papal ring and cloak.

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