On Tuesday, a team of eight restorers started removing the varnish from the painting following years of high-tech research.

Eight restorers are working on the piece in a specially designed glass chamber for the operation's first stage.

This painting is an oil on canvas, and it is in a painted and gilt wood frame. Both the painting and the frame are extremely dirty. The painting has a very yellow varnish on its surface ...

The varnish, applied during a 1975-76 restoration ... Made for Amsterdam's Arquebusiers Guild Hall, Rembrandt van Rijn's 1642 ...