The Haven is covered with extremely beautiful works of art, we could make a whole collection of photos or scans of them, add info about the Haven on “outline text” or “stroke text" so that it's easy to read nomatter what the background is. From there we could spray on some glue, attach 'em to some parchment paper, then chop 'em into stickers supporters could post around town. With enough variety and vibrance, we could have people talking about the Haven all over the city.

Note that the imagery used for these doesn't have to be of the art itself, snapshots of visually fascinating things happening at the Haven can be photographed, then made into stickers. Hell we could use poems and stuff if we wanted to.