These are the wayfinding assets I was talking about. I think the thing I find confusing is that some of the icons represent the building exterior, eg the African Art Museum and the Hirshhorn, while others represent items from the collection, like the Natural History Museum. Plus, there's a mix of really nice shapes, eg the Freer Gallery of Art, and shapes that have far too many fussy details, like the Air and Space Museum or the Star Spangled Banner icon. Random fact: the Portrait Gallery is not part of the Smithsonian network. Who knew??

I recently had to make pictographs of the landmarks around Washington, DC, and I made two sets of each, depending on use. Personally, I think these are more visually unified than the maps located on the National Mall, but I might be biased. Sadly I don't have a picture of the Mall maps for comparison. Done in Illustrator.