You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
Q: Category: ARCHITECTURE 
Clue: De Maupassant, Zola & Dumas fils were among those signing a petition decrying it as "a gigantic... factory chimney"
A: 
the eiffel tower