[1] Giurescu was born in Chiojdu, Buzău County and studied at the Saints Peter and Paul High School in Ploiești.
He graduated in July 1898 from the University of Bucharest with a diploma in Philosophy and Letters.
1880), the daughter of Costache Antonescu, a local merchant, and married her in January 1901.
In October of that year they had a son, Constantin C. Giurescu, who went on to become a noted historian.
[2][3] After a stay in Vienna, he settled in Bucharest, where he taught at the Cantemir Vodă High School,[4] starting in 1906.