Merkez Efendi

Merkez Efendi was the popular nickname of Musa bin Muslihiddin bin Kılıç (1463–1552), an Ottoman Islamic scholar and Sufi. He is also credited as the founder of "Mesir macunu", a therapeutic paste believed to have cured mental diseases amongst many other benefits. He was maybe briefly married to a Selim I's daughter, Şah Sultan from 1551 until he died in 1552. He had three children by his first wife: two sons Derviş Çelebi and Ali Çelebi, and a daughter Ümmü Hatun.

Mesir Merkez Efendi is credited as the creator of "Mesir macunu", a gum-like paste, which he prepared mixing 40 to 45 different herbs and spices. He used to medicate the patients having mental disease in the mental hospital of Manisa he was the chief physician of mesir macunu. But Raşit Öngören from the Islam Encyclopedia finds this claim implausible.