The IEM, through a team of 6 researchers coordinated by Amélia Aguiar Andrade, participates in the project Glosario critical of Medieval Taxation promoted by Unité Mixte de Recherches 5648 (Histoire et archéologie des mondes chrétiens et musulmans médiévaux) and the Department of Estudios Medievales del Consejo Superior de Investigaciones Científicas (Institución Milà y Fontanals) of Barcelona. It intends to establish a digital, critical and multilingual glossary that allows solving doubts and problems that historians (even when they are not specialists in the subject), could have around medieval taxation lexicon, within the geographical scope of the Mediterranean West.