Modern excavations continue to increase our understanding of the site and correct the work of earilier scholars. In 1958, P.J. Parr and C.M. Bennett of the British School of Archaeology began an excavation of the city center which remains the most informative and scientific to date. Recently, the Petra/Jerash Project, undertaken by the Jordanian Department of Antiquties, the University of Jordan, the University of Utah, and Swiss archaeologists, have excavated a number of monuments at these two sites. Architectural remains now visible at Petra indicate a thriving city; however, despite almost 100 years of excavation, only one percent of the city has been investigated.