It’s not hard to understand why this Ionian gem has seduced the great and the good for hundreds of years, D.H. Lawrence, Oscar Wilde, Sophia Loren, Greta Garbo and Audrey Hepburn among them. Vast ceilings, idyllic cloisters and terrace after terrace overlooking Mount Etna and glimmering Mediterranean waves: these are the tropes of Sicilian charisma that run right through this 14th-century monastery and convent.