Finally tonight, a previously unknown work by one of the great French Impressionists has come to light and will soon go on the auction block.

Delicate brush strokes in vibrant colors.

A child on his nanny's knee playing with toys.

It's the work of Pierre Auguste Renoir, apparently one of a series done in the 1890s.

The boy is one of his sons, Jean, who had become a great filmmaker.

His nanny, Gabrielle Renard was a favorite model of Renoirs.

We were particularly surprised by how fresh the painting was.

In other words, it is a painting that has retained all of its colors perfectly, which has not been recanvassed, retouched, or revarnished.

So it is really an exceptional condition, and if you look closely at the canvas, you can see that there is still some loose canvas around the edges.

No one has touched it, so the last person to have touched it was probably Renoir himself.

Renoir gave it to his only student.

It's been in her family ever since, never exhibited, though versions are in museums in Washington DC and Paris.

In the late 19th century, Renoir had returned to Impressionism after trying other styles.

He's known for intimate and candid portraits that use vibrant light and saturated colors.

It is exceptional because first of all, it is a master class of intimacy.

We see this very tender relationship between Joan and Gabriel, who knows how to control the child so that Renmore can paint him.

So Gabrielle is not just anyone.

Gabrielle is not only Auguste Renoir's nanny, but also one of his great models.

She posed for Renoir almost 200 times.

The painting heads to auction in Paris at the end of the month.