The International Congress of Orientalists, initiated in Paris in 1873, was an international conference of Orientalists. It was later renamed as the International Congress of Human Sciences in Asia and North Africa and then as the International Congress of Asian and North African Studies. This material covers the interaction of the Royal Asiatic Society with the Congress in the time period 1889 to 1993.

The 19th International Congress of Orientalists was held in Rome in September 1935. The material from this Congress is:

• "First Communication" from Dr Vittore Pisani, Secretary, Organising Committee, to inform of the date of the forthcoming Congress to be held in Rome from 23-29 September 1935. Typed with handwritten annotations, dated March 1935.
• "Extract from Minutes of Council 11 April 1935" which states that Professor Margoliouth will represent the Society when the invitation comes for the Congress. Handwritten.
• Letter from Henriette Devonshire to Colonel Hoysted, Secretary, Royal Asiatic Society, to inform him that she has not yet made contact with Mrs Friend. She asks if she may consider herself a delegate from the Royal Asiatic Society at the forthcoming International Congress of Orientalists where she will be delivering a paper on The Upkeep of Islamic Monuments in Cairo. She asks for Hoysted to send an article from the Journal. Handwritten, dated 26 April 1935.
• Letter from Col. Hoysted to Mrs. Devonshire to reply to her letter. He hopes she will meet Mrs Friend in the autumn, and that she must consider herself a delegate of the Royal Asiatic Society. He encloses an offprint of the journal article she requested. Typed, dated 7 May 1935.
• Second Communication from Dr Vittore Pisani, Secretary, Organising Committee for the 19th International Congress of Orientalists, giving details of fees and transport suggestions. With the communication is a list of hotels and a form to order accommodation. Printed, dated May 1935.
• Letter from Col. Hoysted, Secretary, Royal Asiatic Society, to The Secretary, XIX International Congress of Orientalists, to inform that the Council have appointed their President, Professor Margoliouth, as the official representative. Typed, dated 8 May 1935.
• Letter from Col. Hoysted, Secretary, Royal Asiatic Society, to The Secretary, XIX International Congress of Orientalists, to thank for the Second communication and ask for the third communication and details. Typed, dated 12 June 1935.
• Letter from Henriette Devonshire to Colonel Hoysted, Secretary, Royal Asiatic Society, to ask for a further article to be sent to her. Handwritten, dated 25 June 1935.
• Letter from Col. Hoysted, Secretary, Royal Asiatic Society, to The Secretary, XIX International Congress of Orientalists, to inform that other members of the Society will also be present at the conference including Mrs R.L. Devonshire. Typed, dated 9 July 1935.
• Letter from Dr T de Somaggi to Col. Hoysted to write a report concerning the Congress of Rome as many English friends were unable to be present because of the Anglo-Italian political tension. Handwritten, dated 23 October 1935.
• Lidzbarski Trust Medal presented to Nikolaus Rhodokanakis at the International Oriental Congress in Rome, 1935. The medal was presented at the conferences for work in epigraphy. Boxed medal with head, name and dates of Lidzabarski on front and inscription on reverse.