He taught in Beirut in the early years of the 20th century , during the time of one of the early Ottoman massacres of Armenians .
Chakmakjian began his career as a teacher and taught in Gesaria ( Kayseri today ) and in Giresun .
Chakmakjian taught in Beirut in the early years of the 20th century , during the time of one of the early Ottoman massacres of Armenians .
Chakmakjian began his career as a teacher and taught in Gesaria ( Kayseri today ) and in Giresun .