Several New York galleries have hit major milestones in recent months, offering lessons from those in charge.
Pace Gallery's 65th anniversary group exhibition is on show in Geneva until 7 November.
Looking at recent headlines, you could be excused for thinking the traditional dealer model is falling apart.
However, New York galleries are alive with exhibitions commemorating anniversaries of a decade or more in business, offering a counterpoint to the sector's current struggles.
Author's summary: Galleries celebrate milestones amidst market challenges.