The Safavid dynasty was one of Iran's most significant ruling dynasties reigning from 1501 to 1736. Their rule is often considered the beginning of modern Iranian history, as well as one of the gunpowder empires. The Safavid Shāh Ismā'īl I established the Twelver denomination of Shīʿa Islam as the official religion of the Persian Empire, marking one of the most important turning points in the history of Islam. The Safavid dynasty had its origin in the Safavid order of Sufism, which was established in the city of Ardabil in the Iranian Azerbaijan region. It was an Iranian dynasty of Kurdish origin, but during their rule they intermarried with Turkoman, Georgian, Circassian, and Pontic Greek dignitaries, nevertheless, for practical purposes, they were Turkish-speaking and Turkified. From their base in Ardabil, the Safavids established control over parts of Greater Iran and reasserted the Iranian identity of the region, thus becoming the first native dynasty since the Sasanian Empire to establish a national state officially known as Iran.

Persian, also known by its endonym Farsi or Parsi, is a Western Iranian language belonging to the Iranian branch of the Indo-Iranian subdivision of the Indo-European languages. Persian is a pluricentric language predominantly spoken and used officially within Iran, Afghanistan, and Tajikistan in three mutually intelligible standard varieties, respectively Iranian Persian, Dari Persian, and Tajiki Persian. It is also spoken natively in the Tajik variety by a significant population within Uzbekistan, as well as within other regions with a Persianate history in the cultural sphere of Greater Iran. It is written officially within Iran and Afghanistan in the Persian alphabet, a derivative of the Arabic script, and within Tajikistan in the Tajik alphabet, a derivative of the Cyrillic script.