It's the only one of its kind in the world. The MCM holds over 1,000 items belonging to or associated with Callas, including priceless historical artefacts such as rare live recordings, personal items, record collections, sheet music, photographs, dresses, jewellery and much more. The exhibition invites visitors to explore all this in an engaging, interactive way, using drawers, revolving windows, audio-visual material and much more.