In this case specific influences in the pose have long been recognised from Raphael's Portrait of Baldassare Castiglione (now Louvre) and Titian's A Man with a Quilted Sleeve (in 2017 called Portrait of Gerolamo?

Rembrandt saw both of these in Amsterdam, in his day the centre of Europe's art trade, and made a sketch of the Raphael, with its price.

[2] He had tried out a similar pose in an etching of 1639, Self Portrait, Leaning on a Stone Wall (B21), looking rather more rakish.

[1] The artist depicted himself at the height of his career, richly dressed and self-secure.

[4] The scientific analysis of this painting by the scientists at the National Gallery in London[5] revealed the use of the following pigments by Rembrandt: lead white, bone black, charcoal black, ochres and vermilion.