 The event expanded to incorporate dance, ballet, jazz and choirs as well as the orchestral mainstay.It became the world's largest festival of youth arts before closing in 2018.The Aberdeen festivals would conclude with a combined Festival Orchestra led by internationally known conductors, over the years including Claudio Abbado, Carlo Maria Giulini, Walter Susskind and Leopold Stokowski, as well as then-youthful James Judd and Simon Rattle.