My chilly walk took me past the former Pillsbury A-Mill, now home to artist lofts. Here, I unintentionally caught the evolution of grain elevators in a single photo. Brick was used in the late 19th and early 20th centuries. However, in 1901, Minneapolis made history by constructing the world’s first concrete elevator. They were narrow like the one in the middle. Shortly after, larger-scale concrete elevators, like those on the right, won out.