The Korgialenios Library of Argostoli was founded in 1924 and operated in 1925, after the donation of benefactor Marinos Korgialenios, and in 1926 it merged with the pre-existing Public Library of Kefallinia, which had been operating in Argostoli since 1887. The earthquakes of 1953 destroyed the building but the books were rescued after having been housed in other buildings for a few years, so they were returned to the rebuilt library in 1963. The new building followed the architectural style of the old one, while in it; the Basias wing was added to it, in which is also housed the Local Historical Archive of Kefalonia.

Today, the library is lending, but it also has a reading room and offers an internet connection. It also hosts numerous events, educational, cultural and social, while speeches, screenings and conferences are organized.

In the ground floor the Historic and Folk Museum is operating since 1963, where exhibits from the Venetian era (16th century) until 1953, the era of the great earthquakes that destroyed the civilization of the island are exhibited. The collections are organized in such a way that the visitor has the feeling that he visits real places and not a museum. The museum presents aspects of urban and rural life (architecture, clothing, domestic economy, family and social life, folk art, recreation, etc.) as well as religious art and life. The visitor can see representations of entire bedrooms of urban and rural houses, household utensils, embroidery, agricultural tools, maps, historical documents, musical instruments, works of art, religious screens, coins, photographic archives and much more. The museum also has an information library and archive of hundreds of volumes, which is available to visitors, as it aims not only at preserving the historical memory and cultural heritage but also in highlighting the cultural specificity that lives and evolves to the present day.

The opening hours of the museum are 9:00 am – 2:00 pm. daily, while during the summer season it may also work on Sundays.

Right next to the Korgialenio Library, we find another mansion apart from the Fokas Kosmetatos house built in 1841 and left intact by the earthquakes of 1953, which however is residential and not accessible to the public.