Ingrid Detter de Frankopan

Detter earned a doctorate in 1962 from the Faculty of Law, University of Oxford; her dissertation was Treaty-making power of international organisations.[2] She completed another doctorate in 1965 from Stockholm University; her dissertation was Law Making by International Organizations.[3][4] As of 1988, she was Carl Lindhagen Professor of International Law at Stockholm University, and also held an affiliation with the London School of Economics.[5]

She was called to the bar in 1977 and is a member of the Three Stone commercial chancery chambers in Lincoln's Inn.[6]

Detter's books include:

• Law Making by International Organizations (Norstedt, 1965)[4]
• Essays on the Law of Treaties (Norstedt, 1967)[7]
• The East African Community and Common Market (Longmans, 1970)[8]
• Finance and Protection of Investments in Developing Countries (Gower, 1974; 2nd ed., 1987)[9]
• International Law and the Independent State (Gower, 1974; 2nd ed., 1988)[10]
• International Adoptions and the Conflict of Laws (Almqvist & Wiksell, 1975)[11]
• Bibliography of International Law (Bowker, 1975)[12]
• The Concept of International Law (Norstedt, 1987; 2nd ed., 1995)[13]
• The Law of War (Cambridge University Press, 1988; 3rd ed., 2017)[14]
• The International Legal Order (Dartmouth Publishing, 1994)[15]

Detter married a Croatian man, who adopted the name Louis Doimi de Frankopan in the 1990s. Their daughter Paola married Lord Nicholas Windsor of the British Royal Family, becoming Lady Nicholas Windsor,[16] and their son Peter Frankopan, a historian and hotelier, married Sainsbury heiress Jessica Sainsbury.[17]