Dicaearchus (c. 300 BC) was a Greek scholar from Messina in Sicily and a pupil of Aristotle. He was probably the first to introduce the concept of cartographic reference lines, developed later into the more formal meridians and lines of latitude. His first map appeared to use a north/south great circle that ran through Rhodes and also employed what was later to become the 36º parallel, which extended from Gibraltar to Rhodes as well as running through Malta. Regarding the Atlantis mystery, Sergio Frau refers to the comments of Dicaearchus, who stated that the northern end of the Adriatic was further from Greece than the Pillars of Heracles which according to Frau would place the Pillars in the vicinity of Malta. Apart from Frau, this interpretation would also appear to lend credence to theories of other writers such as Anton Mifsud, who champions a Maltese location for Atlantis.