 A few years later, in 1996, the Museum had its second major expansion which included the installation of the Mari Sabusawa Michener Wing, also designed by Lynn Taylor Associates.In 1999 there was a major expansion in the museums collection when Gerry and Marguerite Lenfest donated 54 Pennsylvania Impressionist paintings along with $3 million for the museum's endowment.In 2007, the Museum opened the Syd and Sharon Martin Wing, designed by architects RMJM Hillier from Princeton, NJ.