Conversation so far:
What was Juvenilia?
Juvenilia are musical or artistic works produced by an author during their youth.
Is there anything interesting in the article on Anton Webern?
Anton Webern's earliest works consist primarily of lieder.
What are Anton Webern's other works?
Other works include the orchestral tone poem Im Sommerwind.
Were Anton Webern's juvenilia recorded?
Anton Webern published little of his early work.
What genre did Anton Webern play?
Anton Webern's earliest works consist primarily of lieder, the genre that most testifies to his roots in Romanticism.
Were any of Anton Webern's works a success?
During and shortly after the post-war period, Anton Webern was posthumously received with attention.
Who inspired Anton Webern and his contemporaries?
Segantini's work was a likely inspiration for Anton Webern's 1905 single-movement string quartet.

Question: What were his works mainly about?
Self-contained rewrite: What were Anton Webern's works mainly about?