But the West German has met with much criticism for the rapid pace with which he has pursued reunification, and political opponents have suggested that he is overeager to on go down in history as the father of a new Germany.
Kohl is the latest in a long series of major world figures invited to Harvard's graduation ceremonies, which on occasion have served as a platform for the unveiling of groundbreaking policy initiatives.
Marshall Plan
The most famous example was the 1947 speech by then Secretary of State George C. Marshall, who announced the "Marshall Plan" for rebuilding war-torn Europe.
The address by von Weizsacker three years ago was planned as the 40th commemoration of Marshall's speech.
Kohl came to Commencement last year to see his son Walter graduate from the College, but the German leader shunned publicity during the visit.