Çelebizade Şerif Hasan Pasha

With the outbreak of the next Russian-Ottoman War in 1787, Hasan was called back to military command in the Danube region at Misivri and Vidin. He was promoted to liva in 1788, and in July 1789 the sancaks of Niğbolu ve İnebahtı were added to his responsibilities. However, he was dismissed from İnebahtı on December 21, 1789, and from Vidin and Niğbolu five days later.^[11][12]

After the death of grand vizier Cezayirli Hasan Pasha, Şerif Hasan was called to the military headquarters in Şumnu, where he was made serdar-ı ekrem vekili (deputy commander-in-chief) on April 1, 1790. At the recommendation of Şeyhülislam Hamidîzade Mustafa Efendi, the next grand vizier would be chosen by lot. The names of all viziers in Rumelia were written on pieces of paper and placed in the Chamber of the Hırka-i Saadet in Topkapı Palace, where Sultan Selim III drew Hasan's name. After investigation into Hasan and inconclusive prayers for guidance (istihâre), it was decided that since Hasan was from the family of the Prophet (âl-i resûl), his appointment would be appropriate. He was made grand vizier on April 16, 1790. He was also promoted to serdar-ı ekrem (commander in chief). Yergöğü was retaken, and on September 18, 1790 an armistice was reached with Austria. Russia’s attempts at making peace were not accepted, though, because the return of Crimea was considered non-negotiable. Selim ordered continual attacks on Russia. Hasan obeyed reluctantly because he did not trust the army. He was not successful in his Russian campaign, and the Russians quickly captured Kili, Tulça, İsakçı, and İzmail. Hasan blamed the kaptanpaşa, the Tatar Khans, and the "rotten army" for the losses. Hasan, however, had damaged his own position with "arbitrary actions," too much "frankness," and alleged bribery and desertion.^{[13][14][15][16][17]}

Hasan was shot in his quarters or while being transferred to other quarters in Şumnu in the night of February 12-13, 1791 (or on February 11), by order of Selim III. His severed head was put on public display in Istanbul. He is reported to have been buried in the cemetery of the Aziz Mahmud Hüdâyî lodge in Üsküdar, since he was a member of the lodge's Celvetîyye order. He is also reported to have been buried in Şumnu, next to a small mosque on a hill overlooking the city.^{[18][19][20][21]}

As a Rusçuk notable, Hasan may have engendered some fear that he might rebel against the state, and in fact, his brother Çelebi Mehmed Ağa was killed soon after him.^[22][23]