Expatriates going about their shopping in Amsterdam were given a shock recently when an alarm sounded and one of the characters from Rembrandt's The Night Watch suddenly appeared.
Over the next few minutes a scene unfolded with people dressed in the costumes from the master's great work all making their way across the precinct.
The flashmob culminated in all of the components coming together to recreate the scene from the 1642 painting in a large frame that dropped down from the ceiling.
Spectators were left stunned by the carefully choreographed stunt timed to coincide with the work being returned to the Rijksmuseum in Amsterdam.
The museum has been closed for ten years because of a large scale renovation scheme, but will reopen next week.
From April 13th expats in the city will be able to see works by Jan Steen and Franz Hals, as well as Vermeer's The Milkmaid and the most famous piece by Rembrandt.