The 21st session of the Hungarian–Romanian Joint Committee of Historians was held in Sibiu on 28 May–1 June 2012. Lectures were presented concerning the topic Social Structures and Self-identity Strategies. Our institute was represented by Zoltán Szász, President of the Joint Committee’s Hungarian Department, with senior research fellows Zoltán Fónagy and István Tringli. Acting Director General Pál Fodor’s paper was read to the audience in his absence. The hosts were Academician Nicolae Endroiu, President of the Joint Committee’s Romanian Department and Academician Paul Niedermaier, Vice President of the Joint Committee’s Romanian Department. The sessions were held at the Institute of Socio-Human Research (Institutul de Cercetãri Socio-Umane)of the Romanian Academy of Sciences in Nagyszeben (Sibiu). An excursion was also organized for the participants to Resinar, Kis- and Nagydisznód, Kerc and Felsőszombatfalva.