 In 1903, deciding to follow his passion for music, he left for Iași, where he took cello classes at the Iași Conservatory.In summer of 1903, Dimitrescu entered the National School of Fine Arts in the city, studying in the same class as Nicolae Tonitza; the two studied under Gheorghe Popovici and Emanoil Bardasare.After graduation, Dimitrescu painted murals for the Orthodox churches in Agăș and Asău (Bacău County).