This is a painting by Frans Hals a dutch artist. It depicts a meeting of officers and NCOs of the security detail. A 1633
Frans Hals painting in the Frans Hals Museum,
Haarlem.
This lovely card was sent to me by Laury. She says that this is a typical dutch
painting from the 17th Century. The man shown at the bottom of the
picture is Colonnel Yohan Claese Loo. This painting it seems was an inspiration
for a self-portrait by William Merritt Chase.