This broadcasting mast extends into the Chicago skyline from One Prudential Plaza, while the distinctive angled architecture of Two Prudential Plaza casts its presence in the background. One Prudential Plaza, a 41-story skyscraper completed in 1955, was significant as the first new downtown skyscraper in Chicago in 21 years and served as the headquarters for Prudential’s Mid-America company. Its mast was once used as a broadcasting antenna for Chicago’s WGN-TV. Two Prudential Plaza, completed in 1990, stands out with its stacked chevron setbacks and a pyramidal peak rotated 45 degrees, crowned with an 80-foot spire.