Philip Guston's painting "Flatlands" (1970), which belongs to the SFMOMA, satisfies two intuitive criteria of a masterpiece: No one else could have done it, and even Guston could not repeat it.

KENNEBUNK — In view of the worldwide coronavirus pandemic, the Art Guild of the Kennebunks (AGK) has postponed its traditional spring 2021 jury date until September. Artists must pre-register ...