Just a few useful links if you are interested in the late, great Iranian philosopher and religious thinker Sadr al-Din Shirazi known as Mulla Sadra (1571-1635).
This is the official page of the Sadra Islamic Philosophy Research Institute in Tehran who sponsor conferences, edit his texts, produce translations, and publish an excellent journal Khiradnama-yi Sadra:
And here is a link to a brief encyclopaedia entry:
http://www.iranica.com and then search alphabetically for Molla Sadra.
My entry for the Stanford Encyclopaedia of philosophy should be online in spring. Meanwhile here is the link to SEP, the best philosophy resource online: