Rescheduling means Armory Week art fairs will be spread over two weeks in 2018

British artist has added a number of small inside jokes throughout vast exhibition

Sotheby’s offers its most valuable Old Master sale in London, and a Guardi painting at Christie’s could break records

Our pick of highlights from upcoming auctions

German dealers to relaunch in expanded gallery in September after 18-month refurbishment

Auction houses capitalise on summer season of biennales and art fairs

Successful contemporary auction calms nerves after Christie’s decision to cancel its own

Art fair is attracting a younger crowd with its glamorous but collegial approach

Max Beckmann’s Birds’ Hell sells for a record £32m, with new highs also notched for Hannah Höch and Georges Vantongerloo

Our pick of highlights from upcoming auctions

The first edition of the now yearly event, which changed its name of the Biennale des Antiquaires, opens in September

New research reveals underdrawing that dates the painting to a decade earlier than previously thought

Our pick of highlights from upcoming auctions

Modigliani Project aims to throw new light on a market bedevilled by fakes and squabbles

After a show in Venice and sales in Paris a decade ago, US collectors started to take the post-war Japanese movement seriously and demand soared—but have prices peaked?

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

Artcurial auctioneers left surprised as sale of 100 light sconces from Firminy World Heritage site is halted

Our pick of highlights from upcoming auctions

Our pick of highlights from upcoming auctions

Amanda and Anthony Wilkinson are setting up independent businesses in new locations

Our pick of highlights from upcoming auctions

He has been sentenced to 180 days in a private facility, and three years of formal probation

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

Move marks first major departure from auction house under Edward Dolman

Japanese billionaire Yusaku Maezawa bought the work in New York for almost double the artist's previous record

Our pick of highlights from upcoming auctions

Competition is heating up among galleries seeking to sign exclusive representation of late artists, as both heirs and dealers eye the possibilities

Our pick of highlights from upcoming auctions