One of the most significant consequences of the Safavid rule at the beginning of the 10th century AH (circa 15th-16th century AD) was territorial integration and a return to the borders of the Sasanid era. In other words, the transition from the state of “Muluk al-Tawaif” (Petty Kings) to “Mamalek-e Mahruse-ye Iran” (Protected States of Iran) was the most prominent achievement of the Safavid era. Following this circumistances, the administrative institutions, including the Royal Dar al-Insha (Bureau of Composition), adapted themselves to the new vast geography. This paper aims to address, with a historical-analytical approach and focusing on the internal structure of the Dar al-Insha institution, the impact of this territorial integration, along with the vast geography of Iran and the concentration of power and authority in the center of government, on the official positions, especially on the Dar al-Insha institution. The findings indicate that in this new situation, in addition to the transformations that occurred within the Dar al-Insha, a number of new positions also emerged, which were more territorial in nature and aligned with the vast geography of Iran at that time, rather than being purely administrative or courtly.