AT&T Corporate Center vs Prime Tower

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The Franklin Center is a 60-story supertall skyscraper completed in 1989 as the AT&T Corporate Center to consolidate the fundamental place headquarters of the American Telephone & Telegraph Company (AT&T). It stands at a height of 1,007 feet (307 m) and comprises 1.7 million sq ft (160,000 m2) in the Loop area of downtown Chicago. It's located northeast of the Willis Tower and two blocks east of the Chicago River with a main address of 227 West Monroe Street and an address of 100 South Franklin Street.

From the Loop community area of Chicago that is downtown. The building is the tallest built in the 20th century's last quarter in Chicago. It's the 5th tallest building in Chicago and the tallest in america. It contains office and retail space and a 350-space garage.Tishman Speyer acquired the property in 2004 and renamed the adjoining USG Building as Franklin Center in 2007 after USG relocated its offices. The name was afterwards applied to the complex.

Source: Wikipedia

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The Prime Tower, also called'Maag-Tower' in a previous stage of preparation, is a skyscraper in Zurich, Switzerland. At a height of 126 metres (413 feet ), it was the highest skyscraper in Switzerland from 2011 until 2015, when the Roche Tower at Basel (standing at 178 metres (584 feet )) was finished. The building is situated near the Hardbrücke railway station. The tower replaces an industrial facility that's been demolished. According to its developers, the tower's construction, which took 15 years to plan and execute, was a financial success, with its valuation based on rental rates exceeding the building cost by CHF 110 million.The tower and its two companion buildings, Cubus and Diagonal, are used primarily as office buildings. Due to its opening in December 2011, the tower hosts the'Clouds' restaurant on its top floor, a conference center, the Hotel Rivington & Sons on the ground floor, in addition to the offices of Deutsche Bank Schweiz, Homburger AG, Transammonia, Korn/Ferry International, Citibank Switzerland, Infosys, Repower AG, Ernst & Young, Zürcher Kantonalbank and consulting firms.

Source: Wikipedia