Born in Năsăud, in the Transylvania region,[1] his grandfather Grigore Moisil was a priest; his father Constantin Gr.

[3] His research interests centered on original or unusual aspects, a direction borrowed from his professors, who included Nicolae Iorga, Dimitrie Onciul and V. A. Urechia.

[6] His return to Bucharest coincided with his becoming assistant at the Romanian Academy's newly established numismatics section, a subject in which his interest had grown during his Tulcea years.

This passion had brought him into contact with another numismatist, Dimitrie Sturdza, who helped engineer Moisil's hiring by the Academy.

[4] The first volume's first number appeared in 1924, and by the time the first volume concluded in 1926,[9] the publication had attracted contributions from Nicolae Iorga, Ioan Lupaș, Ilie Minea, Petre P. Panaitescu, Ioan C. Filitti, Dan Simonescu, Emil Vârtosu, Paul Gore, Ștefan Meteș, Sever Zotta and Mihai Costăchescu.

[10] He drew up plans for the country's first school for training archivists, which opened under his direction in 1924 and reached university level in 1932.

[8] As director, he published over 570 studies, including 42 in history, 93 in archaeology, 160 in numismatics, 41 on medals, 22 on seals, 4 in metrology and 15 in didactics, as well as works on heraldry.