You are here:Home/Research/ Library & Archives/ Dumbarton Oaks Archives/ Historical Records/ 75th Anniversary/ 75th Anniversary Images/ 1970 Byzantium and Sasanian Iran symposium speakers, left to right, Irfan Shahîd, A.D.H. Bivar, Averil Cameron, Philip Grierson, Andreas Alföldi, Richard Ettinghausen, Elias J. Bickerman, Richard Frye (seated)