The American Federation of State, County and Municipal Employees will now represent 266 employees at the museum and another 249 at the school

Negotiations have been delayed, with wages proving a major sticking point and with administrators proposing increases well below union members’ demands

Michael Hayden has sued the artist for copyright infringement in latest legal battle

The writer, musician and professor, who died earlier this month, wrote some of the most influential and creative art criticism of the past half-century

More than 200 workers at the museum are striking for a day in protest of stalled contract negotiations