Geocentric model work, the "Almagest", was the culmination of centuries of work by Hellenic, Hellenistic and Babylonian astronomers. For over a millennium European and Islamic astronomers assumed it was the correct cosmological model. Because of its influence, people sometimes wrongly think the Ptolemaic system is identical with the geocentric model. Ptolemy argued that the Earth was a sphere in the center of the universe, from the simple observation that half the stars were above the horizon and half were below the horizon at any time (stars on rotating stellar sphere), and the assumption that the stars were all at some modest distance
Central Institute for the Deaf Louis's Central West End, south of the Washington University Medical School. The westernmost building of the complex is also its oldest, dating to 1928. The institute's original 1916 building was torn down around 2000, when the modern portions of the complex were built. The 1928 building, designed by local architect William B. Ittner, was listed on the National Register of Historic Places in 2015 as a reminder of the institute's early history. Central Institute for the Deaf Central Institute for the Deaf (CID) is a school for the deaf that teaches students using listening and spoken language, also known as