Complex sentence: In 1929, renowned architect Auguste Perret, who also designed the Théâtre des Champs-Élysées, designed a concert hall for the school, called "Salle Cortot", after the school's founder, which still hosts classical music events today.
Split into simpler sentences: In 1929, the renowned architect Auguste Perret, who also responsible for the Théâtre des Champs-Élysées, designed a new concert hall for the school. Named "Salle Cortot" after the school's founder, it still hosts classical music events today.