The American Overseas School of Rome (AOSR) is a private international school in Rome, Italy, accredited by the United States-based Middle States Association of Colleges and Schools. It has three divisions: Elementary School, Middle School and High School. It primarily caters to the international community in Rome, Italy. Students graduating receive the American high-school diploma or the International Baccalaureate. It has been an IB World School since April 1989. The Head of School is Mr. Michael Callan along with Mr. Robert McCarthy as the Secondary School Principal and Mrs. Heidi Hanssen as the Elementary School Principal.