The Encyclopaedia Iranica is a comprehensive reference work dedicated to the history, culture, and geography of Iran and the Persian-speaking world. It covers a wide range of topics, including literature, art, religion, and politics, providing detailed articles written by experts in their respective fields. First published in 1982, the encyclopaedia aims to present a scholarly yet accessible resource for anyone interested in Iranian studies. It includes entries on significant figures, such as Cyrus the Great, and important concepts, like Zoroastrianism, making it a valuable tool for researchers and general readers alike.