Apartment building owner and developer Archstone Inc. announced plans on Monday to raise $3.45 billion via a listing in the form of a real estate investment trust. Barring falling short of the goal, this would make Archstone the largest U.S. commercial real estate IPO in history. If the listing occurs in 2012, Archstone would also become the third largest U.S. IPO of this year, behind Facebook Inc. and the Mexican unit of Banco Santander. The company's performance is being watched closely, as it will gauge how other U.S. real estate companies could perfom in a public offering. More details on the the company's current standing are covered after the jump in the original article from Reuters.