Our pick of highlights from this week's fairs and auctions

Chairman of Contemporary Istanbul is lobbying the government for changes to tax on art

The 18th-century punch bowl was unearthed during an archaeological dig in Philadelphia

The fair sees increased participation from big contemporary art galleries and is collaborating with Magnum Photos for its 70th anniversary

The fourth edition of the art and design fair FOG is coming into its own, while newcomer Untitled has early support from LA dealers

The curator and art historian returns to Turin having previously served as curator at Fondazione Sandretto Re Rebaudengo

The artist’s 1983 homage to his murdered friend goes on show and is more topical than ever

The group of paintings, drawings and collages was created in the Manhattan apartment of the artist’s friend Lonny Lichtenberg, a well-known drug dealer

Seven major works on show by Greek artist who has become a major figure in the Arte Povera movement

The US artist Jill Magid on making art about bureaucracy

Fort Lauderdale survey features around 50 works by German artist, spanning more than four decades

Artist’s refuge in tiny Captiva has been transformed into a retreat

The US artist recreates the Coconut Grove laboratory of the most influential botanist you’ve never heard of

Institution presents parallel exhibitions of Modern Dutch design and site-specific works by the Dutch artist Christie van der Haak

Curators meet in Miami to consider why America needs more of these sprawling exhibitions

Last month’s edition was the last for Rita Aoun, who has made the event a popular annual fixture since its first appearance in 2008

Attendance and sales at Contemporary Istanbul were promising, but political uncertainty deterred some foreign dealers and collectors

Inside the over-the-top parade that launched the new Faena District

Anti-Castro artist and human rights activist El Sexto believed to have been abducted amid crackdown

Ambitious send-off is also gallery's first recent acquisitions show

Miami gives the octogenarian pioneer of kinetic art his first US retrospective

Our pick of what to see at museums and private collections, including Bayrle, Kounnelis, a Kiefer double bill

Here's a breakdown of some of the more interesting projects around town

Villa Vizcaya, Miami’s Italianate estate and gardens, celebrates its 100th birthday with a series of contemporary commissions

Fair’s Public section in Collins Park will take inspiration from the late musician

After last year’s catastrophe, fair expands its exhibition spaces

As Shanghai Biennale, two art fairs and scores of exhibitions open, Sun Xun's video work shut down<br>

Unknown artists rub shoulders with big names, while the fair director wants to stay on