Master of the Stauffenberg Altarpiece the outer panels next to a Crucifixion and have been identified by their coats of arms. When opened the Stauffenberg altarpiece shows, from left to right, the Annunciation, the Descent from the Cross and the Nativity — two joys of Mary framing one of her sorrows. It was kept in the Monastery of St. Anthony in Isenheim near Colmar for which Matthias Grünewald subsequently painted his Isenheim Altarpiece. Master of the Stauffenberg Altarpiece The Master of the Stauffenberg Altarpiece () is a 15th-century Anonymous Master from Alsace or nearby who was stylistically influenced by Rogier van der Weyden. His name
Hinged dissection Hinged dissection A hinged dissection, also known as a swing-hinged dissection or Dudeney dissection, is a kind of geometric dissection in which all of the pieces are connected into a chain by "hinged" points, such that the rearrangement from one figure to another can be carried out by swinging the chain continuously, without severing any of the connections. Typically, it is assumed that the pieces are allowed to overlap in the folding and unfolding process; this is sometimes called the "wobbly-hinged" model of hinged dissection. The concept of hinged dissections was popularised by the author of mathematical puzzles, Henry Dudeney.