St.Mary Joseph Rossello(1811-1880) found the congregation of the Daughters of our Lady of Mercy, on August 10,1837 in Savona, Italy. St. Rossello was an Italian woman with an open heart, mind and a prophetic vision filled with a strong character, proclaimed the mercy of God and shared the message of salvation with all the people in the world.  She was born on May 27th, 1811 in Savona, Italy. She was canonized on June 12, 1949.  Her body is intact in Savona at General house, after long rest of 40 years in the grave.

The aim of the congregation is to diffuse the Mercy of God in the world being like Mother Mary-Mother of Mercy, the one who appeared in Savona on March 18th and April 8th, 1536 to Antonio Botta.