What did Albert Camus study at the University of Algiers?

At the University of Algiers, Albert Camus was registered as a philosophy student.1

During his time there, he was significantly influenced by his teacher, Jean Grenier, who helped him develop his philosophical and literary ideas. In 1936, Camus obtained a diplôme d’études supérieures for a thesis that explored the relationship between Greek and Christian thought in the philosophical writings of Plotinus and St. Augustine. He later pursued the agrégation—a qualification required for a university teaching career—but his studies were interrupted by a severe attack of tuberculosis.1