MARE LIBERUM • FREE TRANSLATOR.ORG • Definition of Mare liberum

... kinds, had been thrust upon him one after another, in all of which he had acquitted himself with dignity and brilliancy. He was but twenty-six when he published his argument for the liberty of the sea, the famous Mare Liberum, and a little later appeared his work on the Antiquity of the Batavian Republic, which procured for him in Spain the title of "Hugo Grotius, auctor damnatus." At the age of twenty-nine he had completed his ...

— The Rise of the Dutch Republic, 1555-1566 • John Lothrop Motley