41. He studied at the Sorbonne and �cole pratique des hautes �tudes under the tutelage of Antonius Meillet and Joseph Vendyres. 42. He continued his graduate studies at the Religious Sciences department of the �cole Pratique des Hautes �tudes at the Sorbonne. 43. In addition, from 1892 to 1903, he was director of studies at the �cole pratique des hautes �tudes. 44. In 1980, he succeeded Andr?Chastel at the Renaissance Art History chair at the �cole pratique des hautes �tudes. 45. Since 1998 he has lectured once a week at the �cole pratique des hautes �tudes ( Paris / Sorbonne ). 46. He was then named professor at the " �cole pratique des hautes �tudes ", which became the EHESS. 47. Et la meilleure fa�on de faire progresser la pratique m�dicale est d analyser les r�gles qui pr�valent dans les maladies orphelines. 48. In 2000, Khalaji moved to Paris where he studied Shiite theology and exegesis in the Ecole Pratique des Hautes Etudes. 49. In 1961 he spent 6 months in Paris studying economic history with Jean Meuvret at the �cole pratique des hautes �tudes. 50. In 1979 he returned to France where he studied medieval music under Michel Huglo at the �cole pratique des hautes �tudes.