The Making of Modern Law: Foreign; Comparative and International Law; 1600-1926 [via Gale]
Coverage is primarily from the nineteenth and early twentieth centuries, but there are also several hundred classics in European international law since the seventeenth century.
The Foreign Law component features foreign legal treatises from a variety of countries, covering the national and sub-national (e.g., provincial) laws or jurisdictions. Because the term “treatise” is more of a common-law category, the equivalent works in civil-law systems may have other names such as commentaries, encyclopedias, textbooks, monographs, or festschriften.
Access is courtesy the UC Davis School of Law, Mabie Library.