One of the many important resources for the study of Irān is the ongoing project, Encyclopedia Iranica. The image below will take you to iranicaonline.org, but here are some basic facts about the encyclopedia.
The Wikipedia page for Encyclopædia Iranica gives information about the project, its current status (still publishing volumes), and the role of Columbia University in both this project, and the enormously ambitious History of Persian Literature project, which is discussed in THIS post.
