At Easter, Italians traditionally eat a savory pie called what?

Pizza Rustica

Who is famous for solving the Riddle of the Sphinx and becoming king of Thebes? Who plays the role of Detective David Mills in the thriller "Se7en"? Which Canadian artist recorded the song "Summer of '69"? What area's acquisition from Mexico completed the contiguous U.S. territory in the 1850s? Who was the civil-rights activist murdered in 1963, symbolizing the violence against African Americans during the movement?