The Hellenic Beech Forests Database (GIVD ID EU-GR-007) includes releves dominated or co-dominated by Fagus sylvatica s.l. It includes almost all published releves from the northeast, north-central and east-central floristic regions of Greece. Ca. 50 unpublished releves have been already entered and more than 300 new releves are going to be entered soon. Furthermore, existing releves from northwestern Greece are going to be entered to complete the data. Species data concern vascular plants and additionally most releves have environmental data such as altitude, aspect, and slope inclination. For about 40% of the releves precise geographic locality is given, while for a small proportion (ca. 3%) soil physical and chemical attributes are included. Releve data have already been classified into 14 vegetation units, corresponding to the association or community level. The database is available for research purposes, upon agreement.