40.000 volumes mainly in the field of Greek archaeology and of ancient Greek religion and history, including 450 periodicals.
The Library's material can only be consulted on the Library's premises, - it may never leave the Library.
The fairly small collections kept in the Danish, Finnish, Norwegian, and Swedish Institutes are also searchable in Nordic Library's catalogue.
The Triantafyllopoulos collection at the Norwegian Institute has a separate catalogue.
For a quick reference a list of the periodicals in the Library may also be consulted.