These approaches are particularly valuable when an exhibition deals, as this one does, with a non-elite, popular art conceived and made as an organic extension of everyday life.
Shortly before Russia annexed Crimea, the Bakhchisaray museum, north of Sevastopol, lent some valuable artefacts to an exhibition in the Netherlands.
As Barbara Lekatsas of Hofstra University remarks in her brief but valuable essay in the exhibition's catalog: "We have come to recognize a canon based on a philosophy of reality and an aesthetics that proved to be capable of imitation and repetition.
"Similar this is probably the most direct, democratic and largest global art movement today so the choice to bring international guests, with their own historic and different national backgrounds and their individual talents and approaches to creation – these were the most valuable contributions to the exhibition and the audience".
This year many museums are again presenting exhibitions of valuable collection material.
Exhibitions are valuable for budding artists says Laura Palmer, freelance photographer and filmmaker.
But it provides valuable viewing advice for the exhibition that occasioned it: the Guggenheim's barely there, sometimes invisible exhibition, "theanyspacewhatever".
Antonia Spanos, manager of the County Hall Gallery, said the thieves failed to take the exhibition's most valuable items.
The artwork is worth $20m, making it the most valuable object in the newest exhibition at Hobart's Museum of Old and New Art – the largest privately funded museum in the country.
Its suggestion that the art of the insane is not pure, timeless and autonomous, but part of a larger continuum of art and visual culture, may be the exhibition's most valuable lesson.
So this exhibition does something truly valuable.
