Question: At which university does the phycisist upon who's bestseller "Calabi-Yau" is based teach?

 He has been a professor at Columbia University since 1996 and chairman of the World Science Festival since co-founding it in 2008. Brian Randolph Greene (born February 9, 1963) is an American theoretical physicist, mathematician, and string theorist.  Greene has worked on mirror symmetry, relating two different Calabi–Yau manifolds (concretely, relating the conifold to one of its orbifolds).  He also described the flop transition, a mild form of topology change, showing that topology in string theory can change at the conifold point. <SEP> Delia Buckley Gallagher (born 11 March 1970) is an American journalist based in Rome who currently serves as the Senior Editor for "Inside the Vatican" magazine.  She formerly served as CNN’s Faith and Values Correspondent.  Based in New York, Gallagher was a long time CNN Vatican Analyst, Vaticanologist, and religious journalist.  Prior to joining CNN full time, she lived in Rome for 7 years.  In Rome, she wrote a weekly column for Zenit News Agency and was a contributing editor for the magazine.  The History Channel Documentary, "Angels and Demons Decoded" released by A & E Television Networks profiled Gallagher commenting on Dan Brown's bestseller book which was made into a movie.  Subsequently, Gallagher moderated the Angels and Demons movie press conference film debut in Rome on stage with Tom Hanks, Ron Howard and Dan Brown often speaking in Italian and English.  She knows Pope Benedict XVI personally and travelled extensively with John Paul II, including his last trip to Poland.  Upon the death of Pope John Paul II, she broadcast and commented for CNN Worldwide covering the unfolding event. <SEP> Caspar Erasmus (Erich) Schieler (July 14, 1851 – January 13, 1934) was a German theologian, church historian and priest in the late 19th century and early 20th century.  According to documents provided by Mainz Cathedral and the Diocesan Seminary, Schieler studied philosophy and theology at the Episcopal Seminary in Mainz (Closed during the Kulturkampf in 1878), receiving the Doctor of Divinity degree.  Schieler first served as a priest at the age of twenty-five at Mainz, Cathedral ordained under Bishop Wilhelm Emmanuel von Ketteler in the year 1876.  Due to the Kulturkampf, Schieler was interrogated by the German government and forced to pastor his parish in secret, to avoid further attention.  While secretly pastoring in Weisskirchen, Schieler began working on his dissertation: "Magister Johannes Nider", for which he received the degree of Doctor of Theology, Magna cum Laude in Wurzburg, Germany in the year 1886.  Schieler then become the Professor of Moral Theology at Diocesan Seminary of Mainz in Baden-Württemberg.  After breaking from The Catholic Church and converting to Protestantism, Schieler continued writing books and became a pastor in the Lutheran Church, which later merged into the United Church of Christ, a mainline Protestant Christian denomination, with historical confessional roots in the Reformed, Congregational and Lutheran traditions.  Schieler served as a Professor of theology and Latin American and German language and literature at the Mission House College, which later became Lakeland University.  At the request of the Educational Department, Schieler later took up a teaching position at Redfield College, teaching theology in Redfield, South Dakota.  Schieler was then called upon by the German Evangelical Synod of North America, to teach and preach in communities in Hartsburg, Missouri, Hamel and Johannisburg, Illinois and Marion, Wisconsin. <SEP> Calabi-Yau is a 2001 play written by playwright Susanna Speier with songs and music by Stefan Weisman, based on physicist Brian Greene's national bestseller "The Elegant Universe".