Since 1912 many changes and extensions have been made to the building. Many concerts are given in the Duke’s Hall and operas are performed in the Sir Jack Lyons Theatre. Many of the professors (teachers) at the Academy come from other countries. The Academy works together with King’s College, London where many of the students take a 4 year performance course. In 1997 they won some lottery money which helped them to get a new building for their collection of musical instruments. It has a large library which includes all the books and music which used to belong to the conductors Sir Henry Wood and Otto Klemperer.