Bardi Altarpiece (Parmigianino) Bardi Altarpiece (Parmigianino) The Bardi Altarpiece (), is an Italian Mannerist painting by the Italian painter Parmigianino, dating from c. 1521 and housed in the church of Santa Maria at Bardi, Emilia-Romagna, Italy. In 1521 Parma was invaded by the imperial-papal troops under Prospero Colonna, in the course of the Italian Wars. The young Parmigianino, then seventeen, was sent by his family to Viadana to his cousin's house. According to Italian late Renaissance art biographer Giorgio Vasari, there Parmigianino painted two tempera panels: "St. Francis Receiving the Stigmata" (lost) and the "Marriage of St. Catherine", which was placed in the
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.