The Citi Performing Arts Center's calendar of musicals, operas, rock concerts, dance productions, standup comedians, and classic-film screenings is a culmination of its decades as a Boston historical landmark. Starting out in 1925 as a "movie cathedral," the theater?then a renovated arts center capable of housing the most ambitiously scaled Broadway productions?morphed into the headquarters of the Boston Ballet. Throughout all its names and incarnations, the venue has retained the grandeur and luster of some long-lost wing of Versailles. In the lobby, dark-veined columns carved from imported marble vault skyward toward an arched ceiling and an enormous crystal chandelier that hangs like a pendulum from its center. In the theater itself, frescoes and intricate filigree surround the golden cupola that looms over a sea of scarlet velvet seats?a sight as awe-inspiring to audiences as it is terrifying to first-graders performing their first clarinet recital there.