Work has begun on the old Filene's building in Downtown Crossing. A developer is going to build a $630 million complex of new offices, stores, and luxury homes. Good news for the blighted area of Downtown Crossing; it has been an eyesore for far too many years. Initial plans call for rebuilding the original Filene’s into a retail and office building. Some months later construction will begin for a 50 story tower containing apartments, condominiums and additional stores.