Herman Gustaf af Sillén (20 May 1857 – 29 December 1908) was as Swedish naval officer and marine artist.
[1] For 15 years he served on board the royal yacht, Drott (1877) [sv]; from 1898 he was the commander of the ship.
He took painting lessons from Hulda Schenson [sv] in Stockholm, but also from Norwegian painter Frithjof Smith-Hald [no] in Paris and Hans Gude in Berlin.
[1] His art was appreciated by among others the Swedish king, Oscar II; Herman af Sillén depicted the two together on the deck of Drott in one of his paintings.
[2] The German Emperor Wilhelm II and the Queen of Romania also bought paintings by Herman af Sillén.