An exhibition at Christie's new space in Southampton covers the full range of Grace Hartigan's career.

Robert Longo's new exhibition of monumental charcoal drawings at Guild Hall draws from both Abstract Expressionism and recent events.

The third annual Hamptons Dog Show happens on Saturday from noon to 3 p.m. at the American Legion Hall in Amagansett.

A conversation between the landscape architect Perry Guillot and the designer David Netto will be the highlight of the East Hampton Historical Society's summer lunch and lecture at the Maidstone Club.