https://geheugen.delpher.nl/en
The Memory is a database containing paintings, drawings, photographs, sculptures, ceramics, stamps, posters and newspaper clippings from more than a hundred Dutch museums, archives and libraries.
https://www.ra.ee/dgs/explorer.php
Saaga is a collection of digitised archival records of the National Archives of Estonia and Tallinn City Archives.
http://dl.ub.uni-freiburg.de/diglit/psychische_studien_ga
Monatliche Zeitschrift vorzüglich der Untersuchung der wenig gekannten Phänomene des Seelenlebens.
Periodika aus den Sammlungen polnischer kultureller und wissenschaftlicher Einrichtungen.
The State Archives form a network consisting of 3 central archives located in Warsaw and 30 regional archives with their branches
https://jbc.bj.uj.edu.pl/dlibra
Digitale Sammlung der Uniwersytet Jagielloński in Krakau.