Ducatuum Livoniæ et Curlandiæ.., 174018th century, 5 decade, Map of Lithuania/Poland description Ducatuum Livoniæ et Curlandiæ.., 1740 R. & J. Ottens (brother engravers/ publishers): “Ducatuum Livoniæ et Curlandiæ..,” Amsterdam. See the 1745 version. Year 1740 Author R. & J. Ottens Sources National Library of Estonia: http://www.nlib.ee/