Conversation so far:
What did Daniel Barenboim write in his biography?
Did Daniel Barenboim have any siblings?
Where did Daniel Barenboim go to school?
In the summer of 1954, Daniel Barenboim's 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?