Mary, Untier of Knots or Mary, Undoer of Knots or Our Lady, Undoer of Knots is the name of both a Marian devotion and a specific Baroque painting which represents the devotion. The painting by Johann Georg Melchior Schmidtner, of around 1700, is in the Catholic pilgrimage church of St. Peter am Perlach, otherwise known as the Perlach Church, in Augsburg, Bavaria, Germany. Devotion to the image had once been limited to certain countries in Latin America, but became known worldwide since the 2013 election of Pope Francis. Johann Georg Melchior Schmittner, c. 1700–1705 — painted at 75. Oil paint. 182 × 110 cm. In the St. Peter am Perlach. Baroque. Wiki link