Abstract
While the ontological arguments of Anselm and Descartes continue to be the source of controversy among philosophers and theologians in the West, scant attention has been paid to the ontological argument first formulated by Ibn Sina (370/980 - 429/1037), and thereafter reformulated by various Muslim philosophers throughout the centuries up to the present day. Here several versions of the argument will be presented in historical sequence, and some of the most important recent discussions of the argument by contemporary Muslim philosophers will be mentioned. Some reflections on the argument and the discussions of it will then be presented along with comments of a comparative nature regarding contemporary Islamic philosophy and Western philosophy of religion.