During the 19th century, the acceptable use of ornament, and its precise definition became the source of aesthetic controversy in academic Western architecture, as architects and their critics searched for a suitable style. "The great question is," Thomas Leverton Donaldson asked in 1847, "are we to have an architecture of our period, a distinct, individual, palpable style of the 19th century?". In 1849, when Matthew Digby Wyatt viewed the French Industrial Exposition set up on the Champs-Elysées in Paris, he disapproved in recognizably modern terms of the plaster ornaments in faux-bronze and faux woodgrain: