Conversation so far:
Who was Ludwig Mies van der Rohe?
Ludwig Mies van der Rohe, born Maria Ludwig Michael Mies; March 27, 1886 – August 17, 1969) was a German-American architect.
When was Ludwig Mies van der Rohe born?
Maria Ludwig Michael Mies was born March 27, 1886.
Where was Ludwig Mies van der Rohe born?
Maria Ludwig Michael Mies was born in Aachen, Germany

Question: Did he work?
Self-contained rewrite: Did Ludwig Mies van der Rohe work?