Pope Francis has arrived in the Republic of Ireland's first papal visit for almost 40 years.
The Pope is expected to meet some victims of clerical sex abuse later on Saturday.
In a letter to the world's 1.2bn Roman Catholics, the Pope this week condemned the "atrocities" of child abuse and clerical cover-ups.
The visit coincides with the World Meeting of Families - a global Catholic gathering held every three years.
The Pope was presented with flowers and vestments by children at the airport.
He then travelled to Áras an Uachtaráin, the Irish president's residence, where he has been welcomed by President Michael D Higgins, his wife Sabina and a military guard of honour.