What is remarkable about the work titled, "View from the Window at Le Gras?"

Known as the world’s earliest surviving photograph, “View From the Window at Le Gras” depicts rooftops, a tree and the surrounding landscape. Niépce took the first-ever photograph in 1826 or 1827 from an upstairs window of his estate in Saint-Lop-de-Varenees, Burgundy, France, using a camera obscura and a bitumen-coated pewter plate. He exposed it for several hours. In 1827, Niépce wrote that, while the process needed more work, it marked “the first uncertain step in a completely new direction.”