Downtown Central: This area of downtown is replete with historic architecture, points of interest and outdoor installations. When you are within the boundaries of Main, Field, Federal and Ervay streets, stop by Thanksgiving Square at Bryan and Ervay Streets. Architect Philip Johnson designed its spiral-shaped chapel, which features stained glass by Gabriel Loire. Nearby is the old downtown Post Office and U.S. Courthouse on Bryan Street. The historic Magnolia Building at Commerce and Akard streets was the tallest structure south of Washington, D.C., when it opened in 1922. It was also Dallas' first true skyscraper – 29 stories, 416 feet, a slice of New York transplanted to the prairie. Pegasus Plaza, an unusual urban park with a soothing fountain and carved stones, shares the block with the Magnolia. Legend: I - Post Office, J - Thanksgiving Square, K - Pegasus Plaza, L - Magnolia Building To use: Roll your mouse over the numbers on the left to learn about the sculptures on this tour.