Flocel Sabaté is Professor of Medieval History at the University of Lleida and former director of the Institute for Research into Identities and Society. He has served as an invited professor in the universities of Paris-I, Poitiers, Yale, UNAM (Mexico), Cambridge and ENS (Lyon). He is doctor honoris causa of the Universidad Nacional de Cuyo (Argentina). Luís Adão da Fonseca is Professor of Medieval History (retired) at the University of Porto and President of the Scientific Council of the Centro de Estudos da População, Economia e Sociedade.
He has served as an invited professor in the universities of Navarra, São Paulo, Johns Hopkins and EHESS (Paris).