Estonian Photographic Heritage Society unites people working with or interested in Estonian photographic heritage. The aim of the society is to create a professional network, spread knowledge about historic photography and photographic collections in Estonia (both institutional and private).
The society maintains the Biographical Database of Estonian Photographers (until 1944) here in KulturNav and has developed a crowdsourcing geotagging and rephotography site Ajapaik.ee.
More information about Estonian Photographic Heritage Society: http://fotoparand.org.ee
Source list of historical photographs in Estonian memory institutions:
Fotis - Photographs in Estonian National Archive
Kivike - Database of digitized assets of Estonian Museum of Literature
MuIS - Public Portal of Estonian Museums