By Denny Dyroff, Entertainment Editor, The Times Wayne Thiebaud, Boston Cremes, 1962, oil on canvas, 14 x 18 in. Crocker Art Museum Purchase, 1964.22.© 2022 Wayne Thiebaud / Licensed by VAGA at Artists Rights Society (ARS), NY. Two of the area’s most respected museums – Brandywine River Museum of Art and American Swedish Historical Museum — are introducing new exhibitions of art this...