His Holiness Benedict XVI was, like the majority of his predecessors, elected by the college of cardinals (voting-age cardinals) in a papal conclave in 2005.
he did not choose to become pope in fact he sent a letter requesting to retire but not long after his predecessor then pope john Paul the second now blessed pope john Paul the second died.cardinal...
Pope's are not "crowned" per se. But Joseph Ratzinger was inaugurated as Pope Benedict XVI on 24 April 2005, taking position of the pope's home on 7 May of that same year.