Location: Pontmain, France
Date: 1871

Summary:
On January 17, 1871, two children and eventually four children saw a beautiful lady suspended in the air above a neighboring house.  A nun in the crowd led everyone in prayer.  Seemingly at the same time, and for certain on the same day, a Prussian commander halted his army’s advance into France because of an “invisible Madonna barring the way.”  Roughly four months later a peace treaty was signed between France and Prussia.  In February 1872, the Bishop of Laval declared that Our Blessed Mother truly appeared to the children. Eventually the a church was built and elevated to the level of basilica. 

Interesting facts:
-Mary’s apparition to the children had a scroll that showed changing words, such as, "But pray, my children, God will soon grant your request".
-Our Lady was described as wearing a blue robe with many golden stars. She wore a black veil with a golden crown.  She was thought to be about 18 years old.  Her face was marked with deep sorrow.
-As various prayers were prayed, the apparition changed, her stars increased, her hands moved outward, etc.