The gift to N.Y.U., among the largest it has ever received, will create a multidisciplinary center for the study of the ancient world. Consisting of cash and real estate valued at up to $200 million, the gift is from the Leon Levy Foundation. Mr. Levy, who died in 2003, was a Wall Street investor and benefactor of art and archaeology. The university president, John Sexton, and the Levy foundation's trustee, Shelby White, Mr. Levy's widow, are expected to announce the gift today.