A group of school girls in The State Hermitage Museum in what was then called Leningrad, but has since reverted to St Petersburg or just "Petersburg" to the familiar. I believe they are viewing Rembrandt van Rijn's "Return of the Prodigal Son" one of the Master's greatest works and one of his last.
Our friend Andrei said when he was learning to cook, his father brought him to this painting and told him when a piece of roast beef was the exact color of the Prodigal Son's right heel, the meat was done.
Glasnost was shading into Perestroika in the late 80s when this was shot. These girls may have been in a private class and are clearly breaking out of the sub-fusc spectrum of earlier children's clothes.