The archives of the Gallen-Kallela Museum contain material from the life of Akseli Gallen-Kallela, such as receipts, travel documents, brochures, menus, tickets, calling cards etc. This material is still uncatalogued, but it can be made available by special appointment, for example with the Ask the Museum link below.
The Akseli Gallen-Kallela personal archive collection is kept in the National Archives of Finland. This material can be studied at the National Archives with permission from the head of the archives.
The Akseli Gallen-Kallela archive collection at the National Archives of Finland (the Vakka archive database).
Ask the Museum!