Art Nouveau masters such as Louis Comfort Tiffany and Émile Gallé turned the most fragile of materials into iridescent masterpieces that shimmered like seashells or glittered like Byzantine mosaics, as Matthew Dennison discovers

A sale of Modern British Art earlier this year brimmed with the kind of wonderful works that auctioneers find a little heart-wrenching to let go, including a Waterfall full of wild windiness by Sir Kyffin Williams

John Constable painted Salisbury Cathedral and Leadenhall from ...

The gargantuan, bewildering Louvre

The search for still-life subjects led the artist Kate Friend to some of the greatest gardens and gardeners in the country, discovers Tiffany Daneff

Between a Constable resonating with Nature and a Castiglione blaring with turbulence, a picture by Algernon Newton captured the quietude of absolute stillness