When was the nudes covered in the Sistine Chapel?

The nudes in the Sistine Chapel were covered in 1565 during the Counter-Reformation. Pope Pius IV commissioned the artist Daniele da Volterra, who was nicknamed "Il Braghettone" (the breeches maker), to paint over the genitalia of the nude figures to adhere to the Church's stricter moral standards. This act was part of a broader effort to regulate artistic expression within religious contexts during that period.