High Quality Content by WIKIPEDIA articles! 340 on the Park is a residential tower in the Lakeshore East development of the neighborhood of New Eastside/ East Loop Chicago and was completed in 2007. The building briefly surpassed 55 East Erie as the tallest all-residential building in Chicago. It is currently the second tallest all-residential building in Chicago (One Museum Park being the current tallest) at 672 feet (205 meters) with 62 floors.