Adam Olearius was a German scholar, mathematician, geographer and librarian. He became secretary to the ambassador sent by Frederick III, Duke of Holstein-Gottorp, to the Shah of Safavid (Iran), and published two books about the events and observations during his travels.
Adam Olearius by Jürgen Ovens
Russian boyar from one of Adam Olearius's books
Olearius' image of Kazan
Frederick III, Duke of Holstein-Gottorp
Frederick III of Holstein-Gottorp was a Duke of Holstein-Gottorp.
Portrait by David Klöcker Ehrenstrahl
Portrait of Frederick III, Duke of Holstein-Gottorp by Anselm van Hulle