Useful effort from Yale Law School to provide links to key documents in law, history & diplomacy, from the earliest records up until the present. Browse by period, or by theme (e.g. Cold War). Links to supporting documents. Includes documents from 4000BCE to the 21st Century.

US based project, see associated Constitute Project for texts of constitutions around the world, and list maintained by the Constitution Society.

Maintained by the Institute of Advanced Legal Studies (University of London), FIT is a database of basic information on over 1500 key multilateral treaties from 1856 onwards. Includes links to the online versions, where available. For European treaties covering the period 1450-1789 see the Leibniz-Institut fur Europaische Geschichte (IEG) Europaische Friedensvertrage der Vormoderne online.