Mircea Eliade (Romanian: ['mirtSea eli'ade]; March 9 [O.S. February 24] 1907 - April 22, 1986) was a Romanian historian of religion, fiction writer, philosopher, and professor at the University of Chicago. He was a leading interpreter of religious experience, who established paradigms in religious studies that persist to this day. His theory that hierophanies form the basis of religion, splitting the human experience of reality into sacred and profane space and time, has proved influential.

After completing his primary education at the school on Mantuleasa Street, Eliade attended the Spiru Haret National College in the same class as Arsavir Acterian, Haig Acterian, and Petre Viforeanu (and several years the senior of Nicolae Steinhardt, who eventually became a close friend of Eliade's). Among his other colleagues was future philosopher Constantin Noica and Noica's friend, future art historian Barbu Brezianu.  As a child, Eliade was fascinated with the natural world, which formed the setting of his very first literary attempts, as well as with Romanian folklore and the Christian faith as expressed by peasants. Growing up, he aimed to find and record what he believed was the common source of all religious traditions. The young Eliade's interest in physical exercise and adventure led him to pursue mountaineering and sailing, and he also joined the Romanian Boy Scouts.  With a group of friends, he designed and sailed a boat on the Danube, from Tulcea to the Black Sea. In parallel, Eliade grew estranged from the educational environment, becoming disenchanted with the discipline required and obsessed with the idea that he was uglier and less virile than his colleagues. In order to cultivate his willpower, he would force himself to swallow insects and only slept four to five hours a night. At one point, Eliade was failing four subjects, among which was the study of the Romanian language.  Instead, he became interested in natural science and chemistry, as well as the occult, and wrote short pieces on entomological subjects. Despite his father's concern that he was in danger of losing his already weak eyesight, Eliade read passionately. One of his favorite authors was Honore de Balzac, whose work he studied carefully. Eliade also became acquainted with the modernist short stories of Giovanni Papini and social anthropology studies by James George Frazer.  His interest in the two writers led him to learn Italian and English in private, and he also began studying Persian and Hebrew. At the time, Eliade became acquainted with Saadi's poems and the ancient Mesopotamian Epic of Gilgamesh. He was also interested in philosophy--studying, among others, Socrates, Vasile Conta, and the Stoics Marcus Aurelius and Epictetus, and read works of history--the two Romanian historians who influenced him from early on were Bogdan Petriceicu Hasdeu and Nicolae Iorga. His first published work was the 1921 Inamicul viermelui de matase ("The Silkworm's Enemy"), followed by Cum am gasit piatra filosofala ("How I Found the Philosophers' Stone"). Four years later, Eliade completed work on his debut volume, the autobiographical "Diary of a Short-Sighted Adolescent" translated into English and published by Istros Books in 2016.

Using a quote from the above article, answer the following question: What school was he attending during his adolescence?
Spiru Haret National College