Roberto Giulio Mongeri was born to Italian-descent Luigi Mongeri and British-descent Tecla Taylor as the youngest child into a
Turkish Levantine family in Istanbul on 1 August 1873. He had two brothers Federico and Luigi and a sister Marisa. Giulio went to Italy with his sister Marisa, and grew up with his uncles Giuseppe and Michele in
Milan, where he started studying at Liceo classico
Giuseppe Parini. He then continued his education studying architecture at
Accademia di Brera in Milan, where his uncle Giuseppe taught. During his education years between 1893 and 1895, he took part in architecture project competition and won bronze medal. In 1896, he was honored with the
Luigi Clerichetti award. He graduated on 28 October 1896 with an average score of 9.5 out of 10. He then started working in Italy for a grain silo construction at
Port of Genoa. In summer holidays, he visited his mother and brother in Istanbul. After completion of the grain silo project, he returned to the Ottoman Empire to pursue a career. In his early years in Istanbul, he joined Società Operaia Italiana di Costantinopoli (Italian Workers' Society of Constantinople), today Casa Garibaldi (Garibaldı House), and took part in the architectural works of Italians. Giulio Mongeri married to Italian-descent Caterina Capodaini (1877–1900), nicknamed Ketty, he met during a summer holiday in his brother's house on
Büyükada, Istanbul. She died during the birth of her first child Guido (1900–1935). Giulio married then Caterina's sister Cristina (1879–1917). From this marriage, the five children, Ketty (1904), Alda (1909), Giulio (1910), Elena (1912) and Giovanna (1913), were born. While Elena and her family remained to live in Turkey, other members of the Mongeri family moved to Italy. During his stay in Istanbul, he was three times married and had seven children. He lived with his children and the nannies in the beginning in Pera, today
Beyoğlu, and later in
Şişli in houses he designed and built. == Career ==