Contemporary art
William Kentridge plans epic frieze for River Tiber
South African artist will incorporate pollution in 550m-long work
When mourning becomes its own reward: on the work of Doris Salcedo
The Colombian sculptor finds inspiration in grief and channels it into new inventions
A problem for every problem: Mike Pepi on Art is a Problem
Joshua Decter’s book of essays raises questions it refuses to answer
Paranoid visions: Simon Hewitt on the Nordic Biennial of Contemporary Art
This year’s edition of Momentum explores the anxiety of contemporary life
Mostly, you just stand in queues: Orit Gat on Carsten Höller’s Hayward exhibition
Guidelines, warnings and instructions are everywhere in Höller’s latest show
Yoko Ono’s gleeful middle finger: Chloe Wyma on the artist’s MoMA retrospective
The artist’s show is a smart corrective to the standard narrative
The quiet plight of everyday life: Harry Thorne on Duane Hanson
The American sculptor is at his best when his work leaves problems to be resolved
Artists take a politcal standpoint at Denver's Biennial of the Americas
Robert Longo, Adam Pendleton and Kari Altmann, among others, feature in third edition of the event, which opened this week
Yorkshire celebrates Caro with double-venue retrospective
Exhibition at Yorkshire Sculpture Park and Hepworth Wakefield opens this weekend
Artists respond to call from the Bronx
Work by more than 70 emerging artists from across New York featured in Bronx Calling
Cuban government returns Tania Bruguera’s passport
While artist is named first to take up residency established by New York City mayor’s office of immigrant affairs
Fleeting joy: José da Silva on Christopher Williams at Whitechapel Gallery
There was room for improvement in the first UK retrospective of the American artist
Not so simple as something for everyone: Matthew Collings on the Royal Academy’s summer exhibition
The show encapsulates the twisted diversity of contemporary art
Private collections boost contemporary sales in London
Sotheby’s makes highest total ever, while records are set for YBAs at Christie’s
An existential shudder from a pure white surface: Kelly Grovier on the art of Agnes Martin
The US artist’s retrospective at Tate Modern reveals an artist who transcended traumas
Russian museums reel as they are engaged by the orthodox church in a sacred battle
The increasing closeness of church and state is causing concern about the future of museums and artists’ freedom of expression
Richard Prince’s retail therapy in Beirut
The US artist creates site-specific works for the fashion chain founded by Tony Salamé
Italy’s contemporary galleries are pioneering African art
Why support has come from an unlikely corner
Don’t miss these works at Art Basel
The Art Newspaper team shares its favourite works at the fair
The story beyond the booths' walls at Art Basel
From a painting once owned by Ernst Beyeler to an American soldier’s wartime memento, older works at the fair often have a rich history to reveal
Digital romance blooms between art and technology
Computer animation, 3D printing and aerospace software are fast becoming tools of the trade for artists
Soaring Swiss franc makes Basel more of a stretch for Europeans
Dealers from Switzerland acknowledge they need to be aware of buyers’ budgets at the fair
Swiss ski slopes are alive with the sound of art
Second show held in the Swiss ski resort of Gstaad is due to open early next year
African-American artists respond to racial injustice in the US
Works dealing with race relations are hard to miss at this year's fair
German dealer looks to the next generation
Bernheimer Contemporary is launching an exhibition space opposite Museum Island in Berlin
Africa is a state of mind that defies definition
Eurocentric views of the continent’s contemporary art overlook its diversity in an increasinly migratory art world
Collectors are calling the shots at Art Basel and beyond
Roles in flux as patrons establish private museums and foundations or work directly with artists
Sculptures made at Art Basel with Swiss machine precision
Swiss artist Raphael Hefti borrowed state-of-the-art milling machine to carve works