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 (software) reused from lesson to lesson to invoke long-term retention. In version 3 pack, there are four units per language level. Each unit has four core lessons that are about 30 minutes long. The student then moves on to one of the following lesson modes: Pronunciation, Writing, Vocabulary, Grammar, Listening, Reading, Speaking. The Milestone is an exercise at the end of each unit in which students apply what they learned in the unit. In Rosetta Stone version 2 Language Packs, most lessons have two levels; a few have three. The first eight units have 84 lessons, plus eight reviews. The lessons