Measuring in at 683 feet, The Austonian is the tallest building in Austin, Texas. At 200 Congress Avenue, the 56-floor skyscraper offers residences starting at $1.5 million. The tower is also the tallest residential building in the state. In comparison, Priatek Plaza, the tallest building in St. Petersburg, is only 386 feet tall. However, a 41-story tower set to stand at 450 feet will change that upon its projected completion in 2018. The skyscraper, “One St. Petersburg” will offer city residents luxury condominiums starting at $500,000, but the nine penthouses will be priced at over $3 million.