Center for Hellenic Studies, (affiliated with the Harvard University), Washington D.C.
“Menander I, King of India”, 4th April 1989.
British Museum, London.
“Coins of the Greek Kingdoms on the Silk Roads”, Oriental Numismatic Society, 21st April 1993.
“Recent discoveries: hoards and finds of ancient coins from Afghanistan and Pakistan”, Oriental Numismatic Society, 3rd June1995.
“New finds from Afghanistan and Pakistan” Celebration in honour of Francine Tissot, 12th September 2000.
University of London, Circle of Inner Asian Art
“Recent archaeological and numismatic discoveries from Afghanistan and Pakistan: Indo-Greeks revisited”, 12th May 1999.
“Latest Finds from Afghanistan and Pakistan”, 4th May 2001.
University of London, Society for South Asian Studies
“New approaches to Indo-Greek coinage”, 3rd February 1990.
University of London, Indian Art Circle.
“Ships and Shpwrecks in the Indian Ocean. The Role of the Bodhisattva Avalokiteśvara as the Protector of Mariners”, April 10th 2013.
University of Cambridge, Cambridge
“Pleasure Gardens of Sigiriya”, Sidney Sussex College, May 29th 2013.
The Lavery Room, 5. Cromwell Place, London
“A unique gold gilded bronze pectoral of 6th century CE depicting Buddhas and Bodhisattvas” Every Object Tells a Story, The Lavery Room, 5 Cromwell Place, London, 22nd May 2017.
Silk Road Exhibition, The Lavery Room, 5 Cromwell Place, London
““Bamyian, Kizil and Dunhunag: the diffusion of Gandharan motifs along the Silk Road”, 17th November 2018.
Sri Lanka Literary Society UK North
“Ancient Sri Lanka and the ebb and flow of Indian Ocean trade through Buddhist iconographies”, 26th June 2022.