▁for ▁developing ▁a ▁layout ▁template ▁for ▁the ▁h ily e ▁which ▁became ▁the ▁classical ▁approach ▁to ▁page ▁design . ▁ ▁History ▁Born ▁Os man ▁Den ▁Ali , ▁in ▁Ist an bul , ▁he ▁was ▁of ▁Der v ish ▁origin ▁and ▁worked ▁under ▁the ▁name ▁of ▁ ▁H â f iz ▁Os man . ▁His ▁father ▁was ▁a ▁m ue zz in ▁at ▁the ▁Kh ass è ki ▁mos que , ▁a ▁position ▁which ▁afford ed ▁he ▁and ▁his ▁family ▁great ▁protection . ▁ ▁He ▁became ▁an ▁accomplished ▁call ig raph er ▁and ▁was ▁a ▁t utor ▁to ▁the ▁s ult ans ▁Ah med ▁II , ▁Must af a ▁II ▁and ▁Ah med ▁III , ▁and ▁was ▁held ▁in ▁high ▁este em ▁by ▁the ▁s ultan ▁Must af a ▁II , ▁who , ▁according ▁to ▁legend ▁often ▁watched ▁him ▁work ▁and ▁held ▁his ▁in k well ▁as ▁he ▁wrote . ▁ ▁He ▁received ▁his ▁formal ▁training ▁with ▁Su y ol cu za de ▁Must af a ▁E yy ub i ▁and ▁Der vi ş ▁Ali . ▁He ▁studied ▁n ash k ▁and ▁sul us ▁with ▁Der vi ş ▁Ali , ▁and ▁was ▁cert ified ▁by ▁Su y ol cu za de ▁Must af a ▁E yy ub i . ▁Os man ▁also ▁adm ired ▁the ▁work ▁of ▁the ▁ 1 5 th - century ▁call ig raph er , ▁Se y h ▁Ham d ul lah , ▁and ▁spent ▁many ▁hours ▁copying ▁his ▁works ▁ass id u ously ▁in ▁order ▁to ▁perfect ▁his ▁craft