A Vanished World, Online https://mosaicmagazine.com/picks/uncategorized/2014/05/a-vanished-world-online/

May 21, 2014 | Marjorie Backman
About the author:

A new, easily searchable digital archive of documents offers important access to the religious and secular world of prewar Polish Jewry. 

Read more on New York Times: http://artsbeat.blogs.nytimes.com/2014/05/19/new-web-portal-provides-access-to-historic-materials-on-jewish-life-in-poland