Conversation so far:
What was one of Klee's significant works during Paul Klee's mature career?
His Ad Parnassum (1932) is considered his masterpiece and the best example of his pointillist style.
What is somethings significant about Ad Parnassum?
the best example of his pointillist style; it is also one of his largest, most finely worked paintings.
What are some other works from his mature period?
CANNOTANSWER.

Question: What can you tell me about his style from this period?
Self-contained rewrite: What can you tell me about Paul Klee's style from the mature period?