The Alchemist Sedziwoj and King Sigismund III (1867) by the Polish painter Jan Matejko (1838-1893).
Matejko depicted here the famous alchemist not as a charlatan but as a kind of early engineer and scientist, which he was. Because Sedziwoj constructed mines and foundries and did a lot of chemical experimentation.
Miguel Viladrich Vilá
19 hours ago