This is an analytical study on the urban transformation of the District of Heliopolis over 110 years. The study was made by the final years students of the urban Planning Department - Faculty of Engineering - Ain Shams University in Cairo. (Draft version). This work was guided by the Planning course team, headed by Prof. Dr. Shafak El Wakil, with the participation of each of Assoc. Prof. Ahmed Shetawy, Assoc. Prof. Yehya Serag and Assist Prof. Dina Marouf. The work had a strong contribution from the Junior staff of the course, namely: T.A. Aya Mosaad, T.A. Heba Ghalib, T.A. Amany AbdelKhalek, T.A. Nashwa Emad and T.A. Nada Samir