Mary Undoer of Knots , also known as Mary Untier of Knots, is both a painting and a Marian devotion. Pope Francis venerated the painting in a church in Bavaria while he was a student in Germany and brought the devotion home to South America.
Two angels stand beside Mary holding the ribbon of life, symbolic both of the life of the world and the life of each person in the world.  One angel holds up the part of the ribbon that is still full of knots, and Mary, the New Eve, our Mother and our example, takes the ribbon into her hands and prays. Together with the angel we look up to her and feel the compassion and tenderness with which God hears our plea:
The painting also lets us see the way the prayer is answered.  Knots are undone!  Worry, doubt, confusion, temptation, false beliefs, estrangement from God and from one another...  knots large and small, loose and tight are miraculously undone through the action of the Holy Spirit.  The angel who is holding the part of the ribbon symbolic of our life freed of knots, looks toward us to remind us to give thanks and to remember to ask again and again for the help we need:
Beneath the action taking place in heaven, the painting also shows us the guardian angel leading the soul along the path of its life on earth.  It has been the experience of many that this prayer can becomes one's constant companion, and knots will fall away as if they had never existed.  Great blessings follow when we bring this image into the home of the heart and there ~ at any moment of the day or night ~  call out in faith:

Pope Francis' Prayer to Our Lady, Undoer of Knots

Mary, Undoer of Knots,
Pray for us.
Through your grace,
your intercession, and your example,
deliver us from all evil, 
Our Lady, and untie 
the knots that
prevent us from being 
united with God,
so that we, free 
from sin and error,
may find Him in all things,
may have our hearts
 placed in Him,
and may serve Him always
 in our brothers and sisters.

To keep the painting of Our Lady Undoer of Knots, simply press your mouse onto the image and pull it onto your desktop.