شيخ الإسلام
During the reign of Shah Abbas I (1571 – 1629 AD), the argument of the theocratic unity of religious and political power was no longer sufficient to legitimise the Shah's authority: Shi'a ulama renounced the monarch's claim to represent the hidden Imam by teaching that descendancy did not necessarily mean representation. Likewise, as the influence of Sufi mysticism weakened, the Shah's role as the head of the Safaviyya lost its significance as a justification for his political role. Abbas I thus sought to associate himself with eminent ulama like Shaykh Bahāʾi (1574–1621 AD), whom he made Shaykh al-Islām in his new capital, Isfahan. Other famous ulama working under Abbas's patronage were Mir Damad (d. 1631 or 1632 AD), one of the founders of the School of Isfahan, and Ahmad ibn Muhammad Ardabili (d. 1585). By their teachings, they further developed the Shi'a Islamic teachings and religious practice. However, as religion did no longer suffice to support political power in Persia, Abbas I had to develop independent concepts to legitimise his rule. He did so by creating a new "ghulam" army, thus evoking the Turco-Mongol tradition of Timur and his reign.