Photographers’ Identities Catalog (PIC) is “a collection of biographical data for over 115,000 photographers, studios, manufacturers, dealers, and others involved in the production of photographs. PIC is world-wide in scope and spans the the entire history of photography.”
Via
http://www.nypl.org/blog/2016/03/25/introducing-pic
Update: http://www.fotostoria.de/?p=2273