Constitutional History Databases
Oxford Constitutions of the World contains fully-translated English-language versions of all the world's constitutions (both national and sub-national), accompanied by individual jurisdictional commentaries, and supplementary materials, including foundation documents, historical versions of constitutions, and amendment Acts/Laws.
The Oyez Project from the Chicago-Kent College of Law is a freely-available, multimedia archive devoted to the Supreme Court of the United States and its work. It aims to be a complete and authoritative source for all audio recorded in the Court since the installation of a recording system in October 1955.
This HeinOnline database contains a current constitution for every country in original language format and English translation, as well as constitutional histories for many countries. Also includes constitutional periodicals, classic books, and links to scholarly articles and online resources.