Short answers, pulled from the story.
Julio Rey Pastor stood in the basement of the National Library in Madrid during 1915. He had just returned from three years of study at the University of Berlin and the University of Göttingen between 1911 and 1914.
The first independent mathematics research institute in Spain opened its doors in 1915 under the Junta para Ampliación de Estudios. Julio Rey Pastor directed this laboratory before it moved from the basement of the National Library to a modest apartment on Santa Teresa Street.
By 1939 the facility became part of the Consejo Superior de Investigaciones Científicas and was renamed Instituto Jorge Juan de Matemáticas. This laboratory aimed to overcome the isolation and individualism that characterized Spanish mathematicians at the time.
His 1916 publication Introducción a la matemática superior appeared through Corona in Madrid. Another work titled Teoría geométrica de la polaridad came out from the Real Academia de Ciencias in 1929.
Felix Klein taught him at Göttingen while Hermann Schwarz lectured on analytic functions in Berlin. Rey Pastor admired Schwarz's teaching method more than his innovations alone.