Birmingham Museum and Art Gallery conservators are employing a technique called X-ray Fluorescence (XRF).

BBC: Staffordshire Hoard X-rayed by Birmingham museum

They also contracted a touch of the Impressionism that had drifted down from France. (A good many Americans who went to Florence also made their way to Claude Monet's Giverny, where they acquired the dappling method at its source.) From the Yanks, the Italians picked up some tips on technique coming out of the newly robust art milieus of Boston, New York and Philadelphia.

WSJ: Americans in Florence | Palazzo Strozzi | The Florentine Mix | By Peter Plagens

Some photographers have thrown every filter and post-processing technique at a photo and called the result art.

CNN: Art photography: When 'reality isn't good enough'

He said the digital technique was more commonly used in architecture than for art installations.

BBC: Maquette of Amy Winehouse statue

The artist studied art at the University of Florida, where he developed the three-dimensional technique that helped establish him as a street artist in New York.

BBC: James Rizzi, US pop artist, dies aged 61

More than three centuries later, etching is still a regularly practiced technique in printmaking, but its use has spread to fields far beyond the art world.

FORBES: The Transcendent Technique of Etching, from Rembrandt to Nanoscience

Drawing from jazz legends such as Oscar Peterson, Art Tatum and Chick Corea, Eldar's style is marked by his incredibly precise technique and the complexity of his improvisation.

NPR: Eldar: Complex Improvisation