An exhibition of rare costumes worn by world-renowned Greek opera diva Maria Callas and her historical appearances at the La Scala opera house in Milan has opened in the ground-floor foyer of the Megaron-Athens Concert Hall, parallel to performances at the Megaron of Donizetti's opera "Maria Stuarda", which premiered at the Teatro La Scala in December 1835.

Titled "Maria Callas and La Scala", the exhibition features 20 unforgettable costumes worn by Callas at her La Scala appearances, which are being exhibited outside Italy for the first time, as well as photographs and audiovisual material, including original recordings, from Callas' performances at La Scala.

The exhibition, which was inaugurated by Greece's President of the Republic on Wednesday night, will run through May 8 and is open to the public from 10:00 am to 6:00 pm.