Pope Francis has asked the Catholic faithful to "continue to pray for (him)" in a social media post today, the fourth anniversary of his election as Pontiff.

The Pope posted a photograph of himself praying on the balcony of St Peter's Basilica on Instagram, where he has 3.6m followers.

The remark echoes the Pope's first statement on the balcony after his election. He said at the time: "I hope this journey of the Church that we begin today will be fruitful for the evangelisation of this so beautiful city."