1.
the Laocoon group (& Renaissance sculpture): *
When the statue was found it was missing Lacoon's right arm. There was a general desire to replace this missing piece. Pope Clement held a contest for the best replacement, Raphael to judge the entries. Michelangelo refused to get involved. The winner had Laocoon's arm held out, up into the air forming a diagonal with his left leg, a heroic pose suggesting that Laocoon has a chance to fight off the serpents. In 1905 the original arm was found; the restoration was shown to be incorrect. The original arm had been strongly bent at the elbow (as suggested by Michelangelo).
see the 2 illustrations below
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the true Lacoon the false Lacoon

