While both Yale & Harvard allow you to take up to half your courses at their other schools - at Harvard you can also cross register at MIT, Tuft's Fletcher School and any of the other schools that are part of the Boston Theological Institute - Andover Newton, Boston College, Boston U, Gordon-Conwell, Holy Cross Greek Orthodox School of Theology, St. James Seminary and Episcopal Divinity. A huge selection of courses and faith traditions. In addition, Harvard's Pluralism Project is also at the forefront of interfaith study & dialogue.