Coordinated by the Dutch International Institute of Social History, aims to collate global economic history data for 1800- with a focus on economic growth and inequality.

Premier US-based organisation in the field of economic history. Publishes the Journal of Economic History. See also its EH.Net list of datasets available to researchers covering specific topics in economic history.

Major UK-based organisation & publisher of the Economic History Review (which contains an annual bibliography in the final issue each year: List of publications on the economic and social history of Great Britain and Ireland).

Dataset compiled by Bosker et al on 116 cities in Middle East & North Africa with a population over 10 000. Combined with the Bairoch (1988) et al dataset - https://github.com/JakeRuss/bairoch-1988
Article by Bosker et al available at:
https://direct.mit.edu/rest/article-pdf/95/4/1418/1917366/rest_a_00284.pdf

Offers three datasets:
Maddison Historical Statistics - estimates of GDP per capita for countries from AD 1 to 2010 (based on the print publication - World economy: historical statistics 2003, A. Maddison HC 15 - library, floor 3)
Historical National Accounts - detailed estimates of GDP (down to industrial/sector level) for countries, 19th & 20th centuries
Modern Times - data on technology & economic performance for European countries in 1910, 1935 & 1950

By B.R. Mitchell covering the period from 1750-2010. Also available in print (to 2000)

The world's largest documentation and research centre in the field of social history. See its Social History Portal to digitised collections of social and labour history.

Freely available high quality data offering annual economic & financial indicators for 17 advanced economies from 1870-

World economic historical statistics. 2005, C. Sabillon. HC 15

Freely available via the Economic History Association website, this contains some useful articles. Bear in mind that many have not been updated since the early 2000s

Multi-volume work edited by the respected economist Joel Mokyr. HC 15 (floor 3).