Ahmed Karahisari

[3][2] He served in the Imperial Court of Suleyman I, according to the Salary Books, which place him there in 1545, but his period of tenure is uncertain.

Instead, he wanted to reinvigorate the style of the Abbasid calligrapher, Yaqut al-Musta'simi (1221-98), which had dominated Islamic calligraphy prior to Hamdullah's innovations.

[4] However, apart from his students, his style was not widely accepted and was largely overshadowed by the developments made by Sheikh Hamdullah (1436–1520) and Hâfiz Osman (1642–1698).

[2] In terms of the technique and innovations made to the calligraphy, he is considered one of the three most important Ottoman calligraphers along with Sheikh Hamdullah and Hâfiz Osman.

[6] His most important work is the Mus'haf which he penned for Suleiman the Magnificent (reigned 1520-1566), which is preserved today at the Topkapi Palace.