The John Singer Sargent exhibition at the National Portait Gallery is very good. So good, I suspect I'll visit again, like I did with the recent Rembrandt show.

On the right, detail from Portraits of M.E.P et De Mlle L.P,, oil on canvas, 1881.

Sargent, an American expat born in Italy, mostly worked in Europe and moved in the highest society circles. He's most well known for his portraits of high society, but also incuding other artists (including Rodin and Monet), writers, poets and actors. Very prolific, he is truly a master painter, very gifted. Beautiful and awe-inspiring work.

On the right, Dr. Pozzi at Home, oil on canvas, 1881.

Samuel Jean Pozzi was a famous Parisian gynecologist, and bit of a dandy, although a skilled surgeon. From wikipedia :

Sargent depicts him in his dressing gown but looking very much like a Cardinal of the church. The painting is large, a life size person and towers over you.

One of his most famous paintings is Carnation, Lily, Lily, Rose, which usually hangs at the Tate.

A beautiful painting and one of the Tate's most popular :

Last time I was at the Tate, it wasn't hanging (due to the Sargent show preparations probably) and a little girl visiting with her father was very disappointed.