Walter De Gruyter publishes a wide variety of content covering humanities, medicine, the sciences and law. The "De Gruyter Online" platform provides access to title information and the electronic content for De Gruyter journals and books under one roof. Users from the MPG have access to following products: * De Gruyter Journals and Yearbooks - current content of selected serial titles available on the platform (last 13 volumes) * De Gruyter Journal Archive - backfile content of 150 titles * De Gruyter Online / Research Now E-Journal Archive - about 50 journals focusing on research in economics, formerly published by Berkeley Electronic Press until 2022 * De Gruyter eBooks - a collection of purchased e-books which is continuously extended by single e-book acquisitions by MPG libraries

DigiZeitschriften is a digital library containing digitized back issues of core German research journals. At the moment the platform provides full-text access to more than 600 journals dating back to 1850. The archive content is edited on an ongoing basis. Any existing gaps will be filled and missing data steadily added. Users from the MPG have access to the complete journal collection, older public domain content is available free of charge to anyone.

MOML 7 includes historical codes of law as well as commentaries on laws from all over the world. This module supports the research of comparative law and interdisciplinary fields touching the social sciences. Jurisdictions include Great Britain, Ireland, France, Germany, Austria, Switzerland, as well as other countries in northern and Eastern Europe. Of interest to historians is the inclusion of texts in Western languages on significant topics, such as Ausfuerhliches handbuch ueber den Code Napoleon (1810) and Motivi, Rapporti, opinioni e discorsi -- per la formazione del codice napoleone (1838-1849). The large British component, which includes Public General Acts, 1801-1922, assures that about half the titles are in English. In MOML 8, the legal systems of different countries are compared. It contains treatises and other legal writings, such as commentaries, encyclopaedia entries and monographs, mainly from the 19th and 20th centuries. The database is a digital collection of historical legal codes and similar statutory materials, as well as commentaries on codes from around the world, focusing on Italy, Spain, Portugal, Latin America (including Argentina, Brazil, Chile, Colombia, Cuba, Mexico, and other countries), Canada, Australia, New Zealand, Egypt, and India. This archive supports the study of comparative law and the interdisciplinary fields of study that touch on the social sciences. Analogous materials from canon law and Roman law are also included.

The Making of Modern Law: Foreign, Comparative and International Law, 1600-1926, gives any library the kind of historical resources previously found only at the largest and oldest repositories and gives even the most extensive libraries online access to foreign and international legal literature. 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. FCIL includes pre-1926 treatises and similar monographs, sourced from the collections of the Yale, George Washington University, and Columbia law libraries, in the following areas: International Law; Comparative Law; Foreign Law; Roman Law; Islamic Law; Jewish Law; and Ancient Law.

MOML 5 of "The Making of modern law" contains municipal and state regulations and constitutional conventions from three centuries of American legal history. The database supports far-reaching research in legal and social history, from the eighteenth century to the era following World War II. Consisting of US state and territorial codes, municipal codes, and constitutional conventions and compilations. Included topics are the debate on slavery and the post-reconstruction racial law, women's suffrage, education and the school system.