PHILADELPHIA — Accesso Partners LLC has closed on its $85 million acquisition of 1515 Market Street in downtown Philadelphia. The 20-story, 500,000-square-foot office tower sold for $85 million. The property was sold by a joint venture between Winthrop Realty Trust of Boston and Stockton Real Estate Advisors of Philadelphia. Renovated in 2007, the Class A property is currently 87 percent leased to a variety of tenants, including Temple University; Heffler, Radetich & Saitta; Sweeney & Sheehan; Simon & Simon; Rocco Law; the Commonwealth of Pennsylvania; Citizens Bank; and First Trust Bank. Douglas Rodio and Jim Galbally of Jones Lang LaSalle brokered the transaction. Hallendale Beach, Fla.-based Accesso Partners is formerly known as Beacon Investment Properties.