In this museum, the LEGO figures are looking at not-yet-assembled LEGO versions of famous works of art. Identify the artists. Then, take the nth letter, where n is the number of figures in the scene, to spell the answer: ILLUMINATE.
(In some cases, like the Magritte and Matisse, a specific famous piece of art was chosen, specifically because of its fame. In other cases, like the Mondrian and Rothko, it’s the artist who has a distinctive style or color palette or use of shape. For them, the artwork in this museum may not be so famous, but it was chosen to show off that style in as few Lego pieces as possible.)