"He gave his life for us so as not to deny Jesus," Francis said,
speaking in Italian. "He is a martyr and martyrs are beatified".
Beatification is one of the first steps in the complex process that leads to sainthood in the Roman Catholic Church.
Beatification is one of the first steps in the complex process that leads to sainthood in the Roman Catholic Church.
Usually a miracle is needed for a candidate for sainthood to be beatified.
But that requirement can be waived if there is evidence that the person died a martyr.
The Catholic Church posthumously confers sainthood on people considered so holy during their lives that they are now believed to be with God and can intercede with him to perform miracles.
In his sermon, Francis also called on all religions to declare that "killing in the name of God is Satanic".
Hamel's killing came as France's political leaders sought ways to defeat home-grown Islamist violence.
His murder by French citizens was the first Islamist attack on a
church in western Europe and came just 12 days after a Tunisian who had
pledged allegiance to Islamic State drove his truck through a crowd of
Bastille Day revellers in the Riviera city of Nice, killing 84.