We've already noted the appearance of one symposium issue of Contemporary European History on the history of the European Law. Another symposium is the 28:5 (2013) of the American University International Law Review. We've previously some contributions to the AU symposium. Here it is, with links, in its entirety:
Critical Legal Histories in EU Law
Fernanda G. Nicola
Rewriting the History of European Public Law: The New Contribution of Historians
Toward a New History in European Law: New Wine in Old Bottles?
The New EU Legal History: What's New, What's Missing?
Mark A. Pollack
Rethinking the Legal Foundations of the European Constitutional Order: The Lessons of the New Historical Research
Why EU Legal History Matters--A Historian's Response