May 3, 2016: Ethics of Democracy series, Stanford University: Democracy, Militarism, and Art: The View from a Soldier Cemetery.

October 21, 2015: Wyeth Lecture in American Art, National Gallery of Art: “The Art of the Name: Soldiers, Graves, and Monuments in the Aftermath of the Civil War.”

July 17, 2014: Callery Lecture, University of Pittsburgh, School of Information Sciences: “Follow the Bodies, Follow the Names: One Art Historian’s Search through the Archival Remains of the Civil War Dead.”

March 3, 2014: Bettman Lecture, Columbia University, Department of Art History: “The Corpse and the Name: Alexander Gardner and the Origins of the Modern War Memorial.”

February 8, 2014: Frick Art and Historical Center, Pittsburgh: “Black History in the Open.”

September 13, 2011: Panel discussion at Harvard Graduate School of Design, moderated by Krzysztof Wodiczko: “September 11: Memory, Vision, Practice.”

August 31, 2011: Lecture at Gettysburg College: “Remixing Memory: Toward a New Public Understanding of the Civil War.”

April 19, 2011: Lecture at Indianapolis Central Public Library: “Emancipation in Sculpture: A Difficult Legacy.”

March 29, 2011: Lecture at Palmer Art Museum, Penn State: “Putting War on the Mantel: John Rogers and the Memory of the Civil War”

February 9, 2011: College Art Association conference, New York: Panelist in session, “New Life for Memorials on the National Mall.”

January 6, 2011: American Historical Association conference, Boston: Panelist in workshop, “Politics of Memory: Making Slavery Visible in Public Space”

December 1, 2010: The Eldredge Prize lecture, Smithsonian American Art Museum