MARIA CALLAS: The Sacred Flame

Helena Matheopoulos is a Greek-born, London-based journalist, author, biographer, public speaker and opera specialist. She has worked for a number of high-profile publications including Tatler, The Sunday Times, and Greek Vogue, as well as writing a number of books mainly on opera, but including a biography of Juan Carlos I of Spain. She has also worked in an advisory capacity for the Athens Megaron and the Philharmonia Orchestra and is often ask...