This little gem was posted on SkyscraperPage today with little comment. It not only suggests a Jefferson tower atop the Gallery, but also two additional towers and a smaller one occupying the surface lot at 13th and Market.
It certainly wouldn't be a surprise given the street's current transformation, at least in the future once the marketability of NREA's nearby East Market has been tested. In fact, barring any unforeseen economic downturns, this could likely be what Market East winds up looking like in about ten years. But it's also April 1st. So I guess we'll have to wait until tomorrow to find out of it's just a cruel prank.