THE MERRY WIDOW, often called the "Queen of Operettas," comes to the Fox Theatre today. The Czech Opera Prague, conducted by Martin Mazik and directed by Martin Otava, relates the comedic story of a rich widow on a quest to find a husband. For those of us who don't understand the original German, the Fox is kind enough to provide English supertitles. $45-$65. 8 p.m. 660 Peachtree St. 404-817-8700. www.foxtheatre.org.