Conversation so far:
In Vienna, where did Godel Study?
the University of Vienna.
What year did he start studying?
At the age of 18.
What was his major, or field of study?
initially intending to study theoretical physics, he also attended courses on mathematics and philosophy.
Did he change to another field of study?
he became interested in mathematical logic.

Question: When did he graduate?
Self-contained rewrite: When did Kurt Gödel graduate from the University of Vienna?