Chrusanthis was born under the name Charilaos Fillipidis. He studied in the Theological School of Halki from 1897 to 1903 and later went on to Leipzig and Lausanne for further studies from 1907 to 1911. He returned to Constantinople and became editor of the ecclesiastical journal 'Ecclesiastiki Alitheia'. He became first Bishop of Trapezounta (1913-1938) and then Archbishop of Athens (1938-1940).

Konstantinos Maltezos studied in the University of Athens and continued his studies, also with a scholarship, in Physics, in Sorbonne, in the Collège de France and in the Ecole Polytechnique. After his return to Greece, he taught in the Greek Military School, in the University of Athens and the Polytechnic School. He became a member of the Academy of Athens and of numerous other scientfic organizations. He published many books and articles on a variety of subjects, such as elasticity and astronomy.