Claim: Marie-Emmanuelle Bayon Louis was a French architect, disqualified on a technicality from winning the Prix de Rome in architecture in 1755, who died on 2 July 1800.
Evidence: Marie-Emmanuelle Bayon Louis (6 June 1745, Marcei – 29 March 1825, Aubevoye) was a French composer, pianist, and salonnière. 
Victor Louis (10 May 1731, Paris – 2 July 1800, Paris) was a French architect, disqualified on a technicality from winning the Prix de Rome in architecture in 1755.