Love those "elephant" leg pants!
The picture of the two girls sitting holding flowers, I think I know the girl facing the camera. I'll have to send it to her brother and see if he agrees. Depending on when in 1973 these photos were, I spent some time in the spring of 1973 on Fountain Square working on an independent study project I was doing to graduate from high school. I didn't attend school in my senior year, but did this independent study program to finish a requirement for graduation (back then, I was the first person from an archdiocesan high school to finish a year early - I'm not even sure they'd allow it now). I would have been one of those scraggly hippie folks in those photos. :)
My Great Grandmother, Dolores Lipka, was the Chairperson for the Save the Fountain project. She was a powerful civic leader in Cincinnati from the mid 1950's to early 1970's. Her scrapbook and "slides" are amazing.
There is a whole slew more of these pics and ones similar to them on flickr in the U.S. National Archives' Photostream. I got curious when I saw this link and decided to google any other older pics and these came up. Here is a link. There are pages and pages of them.
So the bra was apparently invented in the late 70's or early 80's.
The sixteenth picture down, the one with the lady in the orange dress and the straw hat? I own that dress. I crap you not. I got it as a hand-me-down from this amazingly wonderful woman I knew in New York. It's polyester, orange, and the trim is navy. I wear it with appropriate undergarmented support.