Isaac Abrahamszoon Massa (baptized October 7, 1586, in Haarlem, died 1643) was a Dutch grain trader, traveller and diplomat, the envoy to Muscovy, author of memoirs witnessing the Time of Troubles and the maps of Eastern Europe and Siberia. Massa's experience in and knowledge of Muscovy transformed him into a Dutch "Kremlinologist." The Isaac Massa Foundation in Groningen aims to stimulate scientific and cultural contacts between the Russian Federation and the Netherlands.