In times past, prima donnas used to get out on the road. Some still do. Cecilia Bartoli's "Maria Malibran" tour is travelling from London on to Basel, Nuremberg, Bremen, and throughout eight countries of Europe (including her first appearance in Wales) until June of next year. And she is taking her van with her.

The tour focuses on the life and music of the celebrated early 19th-century prima donna Maria Malibran and the mobile museum, which has been parked outside St Giles's Church at the Barbican this week, is displaying Bartoli's collection of her effects - letters, playbills, and perhaps something of her spirit, too.