The Fourth International Congress of Thracology was held in the Museum Boyrnans-van Beuningen, Rotterdam, from September 21-26, 1984 under the auspices of the International Committee of Thracology "W. Tomaschek" founded during the Third International Congress of Thracology in Vienna, June 1980.
Organised by the Henri Frankfort Foundation, the theme of the congress was "Thracians and Mycenaeans" in an Indo-European context. Thracology and Mycenology are just two branches of Indo-European studies which are of equal value in the discussion on the interrelations between proto-Thracians and proto-Greeks, both having lived in the same geographic area. The subjects of the lectures could be grouped generally under the headings of archaeology, history and linguistics.