Lectures:
- Queen Marie of Romania, Colonel Boyle and the Canadians: A Meeting of Identities, Lecture delivered at the residence of the Ambassador of Canada in Romania, 5 May 2009, with the occasion of 90 years celebration of bilateral relations Canada – Romania
- Queen Marie of Romania and her British royal relatives, 7 March 2001, UCL School of Slavonic and East European Studies, University of London
- Files, Agents and Codes. The King’s Exile. Revelations from the Securitate Archives, 17 July 2014, The National History Museum of Romania
- The symbolism of the monarchy – National Alliance for the Restauration of the Monarchy, Bucharest, 21 March 2013, Bucharest (at the National Library)
- King Michael – Dignity while in exile. The Red scourge: the expulsion of King Michael from Romania in December 1990, 20 March 2013, National Liberal Party’s Bloggers Club
- The Modernisation of Romania. Royal Destinies, 2013, National Liberal Party’s Bloggers Club
- Anniversary of 120 years since the marriage of Princess Marie of Edinburgh and Prince Ferdinand of Romania, 10 January 2013, National Liberal Party’s Bloggers Club
- Royal Destinies: King Michael as a school pupil: curriculum, marks, field trips, 15 January 2014, National Liberal Party’s Bloggers Club
- Eastwell Park, 12 October 2014, The National History Museum of Romania
- Dynastic flows and ebbs, 23 November 2016, Faculty of History. University of Bucharest.
- A Queen with a Mission, 2 June 2018, the Throne Room, The National Art Museum, Bucharest.
- Royal Diplomacy (1919), 17 July 2018, Cotroceni Palace Museum.
Diana Mandache's Weblog 
Dear Ms. Diana,
Hope this email finds you well.
It is very reassuring to find a historian looked deeply into the graceful life of Queen Marie of Romania.
This is Yasmine Wali, a researcher of the American University in Cairo.
Actually, it’s been a while since I have been researching into her life, the lost chapters of the final manuscript, and her relationship with King George V. Unfortunately, most of her books cannot be shipped to Egypt.
I am sorry to bother you. But can you recommend which books that you have published, or of Queen Marie herself that I can try to get. Even ship to friends abroad until I meet them?
If you are looking for an assistant. I would love to be one!
Thank you so much in advance.
And sorry to bother you in case of any inconvenience.
Thank you and best regards,
Yasmine Wali
Dear Yasmine,
Thank you for your message. I am happy that you have find in Queen Marie an interesting character. All the books are available at amazon.com or amazon.co.uk I do not have other possibility. I will keep in mind your offer for assisting me in the future. Kind regards, Diana Mandache
Dear Diana Mandache
Will you be giving any talks or presentations during the exhibition on Queen Marie at Reins? I am thinking of going there at a time to coincide with the music concert next month.
Many thanks.
Best wishes
Gerald Crowson.
UK..
Dear Gerald Crowson,
Thank you for your message. I didn’t have a specific invitation for a talk/conference. But I had several presentations to the French press and to the guides of Palais du Tau.
Best wishes,
Diana Mandache