Édouard Manet
Every year the academy in Paris would hold a big exhibition (art show) called the Salon de Paris. In 1863 Manet put a picture into the show called Lunch on the Grass ("Le déjeuner sur l'herbe").  The judges at the Salon refused to hang this work in the gallery because it showed a naked woman sitting on the grass with two men wearing clothes. If the painting had been about Ancient Greek mythology, this would not be a problem but these men were wearing ordinary suits, and the woman's dress and hat were lying on the grass. Perhaps she was a prostitute. The judges said that the painting was indecent (very rude).