René Descartes (31 March 1596 – 11 February 1650) was a French philosopher, mathematician, and writer who spent most of his adult life in the Dutch Republic. He has been dubbed the 'Father of Modern Philosophy', and much subsequent Western philosophy is a response to his writings, which are studied closely to this day.
At the age of eight, he entered the Jesuit Collège Royal Henry-Le-Grand at La Flèche.
http://en.wikipedia.org/wiki/René_Descartes#cite_note-4 After graduation, he studied at the University of Poitiers, earning a
Baccalauréat and
Licence in law in 1616, in accordance with his father's wishes that he should become a lawyer.
http://en.wikipedia.org/wiki/René_Descartes#cite_note-5
In 1622 he returned to France, and during the next few years spent time in Paris and other parts of Europe. It was during a stay in Paris that he composed his first essay on method:
Regulae at Directionem Ingenii (Rules for the Direction of the Mind).
http://en.wikipedia.org/wiki/René_Descartes#cite_note-Durandin-7 source