Rosetta Stone Athanasius Kircher in the 17th, and Georg Zoëga in the 18th. The discovery of the Rosetta Stone in 1799 provided critical missing information, gradually revealed by a succession of scholars, that eventually allowed Jean-François Champollion to solve the puzzle that Kircher had called the riddle of the Sphinx. The Greek text on the Rosetta Stone provided the starting point. Ancient Greek was widely known to scholars, but they were not familiar with details of its use in the Hellenistic period as a government language in Ptolemaic Egypt; large-scale discoveries of Greek papyri were a long way in the future. Thus,
Rosetta Stone Learning Center brand was acquired and absorbed in Dean Morgan, providing one-to-one and group lessons at two locations in Umeda and Namba, in Osaka. In 2008, the Hummingbird Pronunciation school brand was acquired and integrated into Dean Morgan. Hummingbird Pronunciation is a patented English pronunciation method. As of April 2012, there are a total of ten schools located in Tokyo and Osaka, with nearly 2,000 students. In April 2015, Dean Morgan formed a capital and business alliance with Rosetta Stone Inc. and subsequently rebranded the schools to Rosetta Stone Learning Center. The company then relocated the headquarters from Shinjuku, Tokyo to Ginza,