RADNOR, Pa., May 21, 2015 /PRNewswire/ -- Brandywine Realty Trust (NYSE: BDN ) announced today that effective May 15, 2015 it has entered into a $600 million four-year unsecured revolving credit facility. The new facility replaces the Company's existing $600 million unsecured revolving credit facility that was scheduled to mature on February 1, 2016.