ユルバン・ルヴェリエ
On the return of Ismail Mustafa to Egypt, after 14 years of stay in Europe, the Khedive Isma'il Pasha taking into consideration the wise advice suggested by Urbain Le Verrier to his predecessor to put Boulaq Observatory on the same level as similar establishments in Europe, instructed him to set up a new observatory, which was established in 1868 at Abbassia, and would later be transferred to Helwan, in 1903. Ismail Mustafa al-Falaki took charge of the Abbassia Observatory which became the Khedival Observatory.