Georg Ratzinger with his brother, Pope Benedict XVI, in Regensburg, Germany, in 2006. In 2010, allegations emerged of physical and sexual abuse in the Regensburg boys' choir, which Georg directed from 1964 to 1994. He has not been accused of sexual abuse, and has denied knowledge of any sexual abuse by others, but has admitted slapping students. From 1981 to 2005, as a cardinal, Joseph Ratzinger led the Vatican's investigation of sexual abuse charges against priests around the world. As pope, his handling of accusations of sexual abuse over the past three decades has come under renewed scrutiny (Maurizio Brambatti/AFP/Getty Images)