0001193125-08-231629 424B7 2 20081110 20081110 Digital Realty Trust, Inc. 0001297996 6798 000000000 MD 1231 424B7 33 333-142396 081175412 560 MISSION STREET SUITE 2900 SAN FRANCISCO CA 94105 (415)738-6500 560 MISSION STREET SUITE 2900 SAN FRANCISCO CA 94105 424B7 1 d424b7.htm PROSPECTUS SUPPLEMENT NO. 15 GRAPHIC 2 g23190g33r18.jpg GRAPHIC