For art's sake . . . ''This is Hong Kong, where miracles can happen'', said Gerard Tsang Chu-chiu, chief curator of the Hong Kong Museum of Art, of the priceless Marc Chagall exhibition that almost never made it to the territory. The owner of the spectacular 81-piece exhibition, French gallery Enrico Navarra, originally had no plans to bring it to Hong Kong as part of an Asian tour. But given the chance in February to organise it, Mr Tsang was anxious not to miss such a rare opportunity. Despite the tight timing, the exhibition is being erected now under the supervision of the French gallery's Frederic Leris, and more than 40,000 people are expected through the doors from May 3. ''Chagall, I think, is more accessible than others,'' he said. ''The themes he uses you also find in Asian art. The animals, the love inside the paintings, people flying around. The symbolism. I think people will feel this.''