This is "Bathers at Asnières" by Georges Seurat. Painted in 1884, when he was just 24 years old, it's one of his earliest major compositions and a grand statement that didn't quite make the cut for the official Salon.
The scene shows several men and boys relaxing on the banks of the Seine River at Asnières and Courbevoie, an industrial suburb north-west of central Paris. They're all shown in profile, as if they were sculptures, each lost in their own thoughts without engaging with each other or us. The entire scene is bathed in bright but hazy sunlight, creating an almost eerie stillness.
In the background, you'll notice a railway bridge and the chimneys of factories at Clichy, where some of these men may work. There are also sailboats on the river, which adds to the tranquil atmosphere. Seurat's use of light and colour creates a sense of time being suspended, and all movement frozen.
Seurat's training in classical art is evident in the poses of the bathers, with references to ancient Greek sculpture and Renaissance paintings like those by Piero della Francesca. But despite these traditional influences, his painting was ahead of its time, anticipating the modern style that he would later develop with pointillism.
Bathers at Asnières hangs in The National Gallery on Trafalgar Square, London — free to enter. Point your phone at any artwork there and audioguide.london plays a free audio guide in six languages — no app download needed.