This block was partially excavated during the 1938-1942 campaign. In the early 21st century further excavation took place by the Ostia Marina Project of the University of Bologna, under the direction of Massimiliano David. Important new buildings were found: the Inn of the Deity Pan and the Mithraeum of the Coloured Marble (IV,IX,5), the House of the Two Staircases and Baths of the Skeleton (IV,IX,6), and the Baths of Silenus (IV,IX,7).