It's almost a palimpsest.
How long has it been there? Well, the election of 1972 was almost 45 years ago. Both George McGovern and Sargent Shriver are long dead. Was there something covering it up until recently? How long will it be there?
posted last week.
There are plans to develop this stretch of Roosevelt Road; they've been in the works for at least ten years. But someday that building and that sign will be gone.