'I stay on the hill a long time, but I do not weary of the long wait", sings Cio Cio San in the famous aria Un Bel Di, sung at the unveiling of a new tapestry for Glasgow's Theatre Royal yesterday.

The tapestry's home to be, the theatre's new foyer, was meant to be open this month, but weather-related construction problems mean the opening will now take place in July instead.

It is not a long delay, and hence a little cruel to quote the lines from Madame Butterfly, but then the opera, currently in performance by Scottish Opera, is not without its cruelty.

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When it does open, the work Butterfly, by one of Scotland's most acclaimed living artists, Alison Watt, will undoubtedly have impact, hanging over three floors.

This grand piece of public art is an impressive achievement by the artist, who has not worked in the medium of tapestry before. It is also an excellent showcase for Edinburgh's underrated Dovecot tapestry studios.

With the theatre due to be open to the public from the summer, the work is likely to draw visitors in its own right, making tarrying a pleasure, and forming a most appropriate handselling for the new-look theatre.