Photographers Database - our collection of records on photographers worldwide who were active between 1839 and 1949. The main emphasis is on historic 19th century photographers, though a growing number of early twentieth century records are being added. Currently this database has over 70,000 records, and new information is added weekly.

Dating Old Photographs - based on empirical analysis of characteristics, derived from our collection of thousands of dated images. Tools and resources for assigning accurate dates to images based on the full range of significant properties.

ClassyArts Blog - Information about this site, our ongoing projects and progress, and observations about art and photography in an historical context. Your feedback is invited here as we discuss topics of interest to photography dealers, collectors and historical and genealogical researchers.

Photohistory - a variety of articles, transcriptions and data of interest to those interested in the history of photography. Of particular interest to those with card-mounted images from the CDV and Cabinet Card eras in the USA is our on-line database of American Photographer Imprints. This section also includes our Publication Series, ebooks on photographers of particular locations and eras, and ebooks on identifying dates and subjects from old images.

Biographies - Biographical notes on photographers derived from our own research, or transcribed from old contemporary biographical publications and obituaries, as well as links to online biographies on other websites.

Public Domain Images - A small part of the 30,000 plus public domain photographs in our digital collection have been indexed here, and increasing this database is an ongoing project. The vast majority of these antique photographs have either the photographer or the portrait-subject identified, sometimes both. A few have been included for their historic or aesthetic qualities.