If the sentence´s words order can not be changed:
Marc Thierry (he is from Paris [called the "city of lights"]) is a well-respected doctor.
Basically, i used the parentheses to highlight a brief explanation of the Subject "he is from Paris ..." as demonstrated. And i used the brackets to separate the complement of the explanation without losing the focus of the main message that is "Marc Thierry is a well-respected doctor".