Classical Age of the Ottoman Empire
Expansion continued during the first half of the reign of Suleiman I (r. 1520-1566), who conquered first Belgrade (1521) and Rhodes, before invading Hungary in 1526, defeating and killing King Louis II in the Battle of Mohács and briefly occupying Buda. Lacking a king, Hungary descended into civil war over the succession, and the Ottomans gave support to John Zápolya as a vassal prince. When their rivals the Habsburgs began to achieve the upper hand, Suleiman directly intervened by again conquering Buda and annexing it to the empire in 1541. Elsewhere, Suleiman led major campaigns against Safavid Iran, conquering Baghdad in 1534 and annexing Iraq. Ottoman rule was further extended with the incorporation of much of North Africa, the conquest of coastal Yemen in 1538, and the subsequent annexation of the interior.
Mohammad Taher Vahid Qazvini
Mohammad Taher Vahid Qazvini (, died 1699), was an Iranian nobleman, who served as the "vizier" of the Safavid king ("shah") Suleiman I (r. 1666–1694) and the latter's son Sultan Husayn (r. 1694–1722) from 1691 to 1699. He had diwan in Persian and Turkish languages.
Born in the early 1620s in Qazvin in northern Iran, Taher Vahid was the son of Mortezaqoli Khan Sa'dlu, and belonged to a prominent family, which were known for often serving as the court registrar ("vaqa'i-nivis") of the empire. During Nowruz on March 21, 1691, Taher Vahid was appointed by shah Suleiman I as his "vizier". During the same year, Shahqoli Khan Zanganeh, who had been recently appointed as the head of the royal bodyguard ("qurchi-bashi"), became a rival with Taher Vahid.