Conversation so far:
What did Daniel write in Daniel Barenboim's biography?
Daniel Barenboim was born in 1942 in Buenos Aires, Argentina, to Argentinian-Jewish parents Aida (nee Schuster) and Enrique Barenboim.
Did he have any siblings?
CANNOTANSWER.
Where did he go to school?
Two years later, in the summer of 1954, his parents took him to Salzburg to take part in Igor Markevitch's conducting classes.

Question: Where did he attend after his conducting classes?
Self-contained rewrite: Where did Daniel Barenboim attend after his conducting classes?