A vizier is a high-ranking political advisor or minister in various historical Islamic states, particularly during the Ottoman Empire and Abbasid Caliphate. They were responsible for overseeing government administration, implementing laws, and advising the ruler on important matters. Viziers often held significant power and influence, sometimes acting as the de facto leader of the state. The role of a vizier can be compared to that of a prime minister in modern governments. They typically managed various departments, such as finance, military, and justice, ensuring the smooth operation of the state. Their position required a deep understanding of politics, law, and governance.