Changes are aimed at improving professionalism and shoring up buyer confidence in the wake of growing litigation

Design fair reflects market’s eclectic tastes and aims to attract crossover collectors in town for Frieze

The artist Theaster Gates and architect Jeanne Gang are two of the confirmed participants so far

Our pick of highlights from upcoming auctions

Our pick of highlights from upcoming fairs and auctions

Our pick of highlights from upcoming fairs and auctions

Images by late photographer were last works to be authenticated by artist before his death

Move follows NADA’s switch from Frieze Week to Armory Arts Week

This weekend's festival aims to be engine of economic change

Metropolitan Police investigating theft from stand of Geneva-based Boghossian

From lost keys to lustful claymation, curator Samuel Leuenberger introduces six highlights from Art Basel's Parcours sector

What to expect at the Swiss fair, including new faces and a funfair in the Messeplatz

Organisers hail the lure of Buenos Aires as fair looks to build on its growing appeal for international buyers

Follow curator Toby Kamps's tour of the 20th-century art section

As New Yorkers protest against President Trump during his first visit to the city since he was elected, politically engaged art is more prevalent than ever at the fair. Here is our pick of the most topical works

For Anicka Yi’s Hugo Boss Prize exhibition, the phrase “it’s alive” very much applies

The installation of drawings, collages and sculptures by Susan Cianciolo was inspired by a visit to a Milan eatery

Purchase of Ibrahim El-Salahi’s work builds on recent efforts to diversify permanent collection

The non-profit has provided an experimental platform for artists, including Rauschenberg and Chihuly, seeking to expand their practice into glass

Dickinson gallery's stand celebrates 100 years of De Stijl

Dealer teams up with tribal art expert Bernard De Grunne and anthropologist Carlo Severi to stage a revival with contemporary art

From Cornelia Parker's ode to Jimi Hendrix to Donald Judd's minimalist furniture

Fair “opens the door” to more historical work but maintains its commitment to contemporary

Upson, whose first solo show in New York has just opened at the New Museum, tells us about the constantly evolving nature of her work

In addition to the main fair, a number of other events offer a range of events, exhibitions and enticements across the city. Here are some things to look out for this year.

A peek at some projects around the city

Our pick of the top exhibitions around the city this week

Top names participate for the first time as the ranks of emerging galleries also swell

Contemporary art and a Surrealist feast are on the menu for second north American outing of Maastricht-based import