All photos by Touhey Photography, unless noted otherwiseNew Yorkers can view a recently discovered Michelangelo draft, later reflected in the Sistine Chapel, during a free exhibition ahead of its auction next week. The work will be auctioned off as part of Christie’s Old Master Drawings sale, with an estimated price tag of $1.5 million to $2 million. The “Libyan Sibyl” in the Sistine Chapel. The drawing was identified by Giada Damen, a specialist in Christie’s Old Masters Drawings Department. In a statement, Andrew Fletcher, global head of Christie’s Old Masters Department, called the discovery one of the “most memorable moments” of his career.