The community of students and scholars engaged in higher education and research. The word comes from the akademeia, just outside ancient Athens, where the gymnasium was made famous by Plato as a centre of learning. The sacred space, dedicated to the goddess of wisdom, Athena, had formerly been an olive grove, hence the expression "the groves of Academe. Some sociologists have divided, but not limited, academia according to four basic historical types: ancient academia, early academia, academic societies, and the modern university. There are at least two models of academia: a European model developed since ancient times, as well as an American model developed by Benjamin Franklin in the mid-18th century and Thomas Jefferson in the early 19th century.