Next September, after a long wait and much anticipation, the Addison Gallery of American Art will reopen to the public.

Over the past year, the Addison was completely renovated.

Julie Bernson, the Addison’s curator of education said, “We wanted to keep the integrity of such beautiful architecture.”

Despite the building looking the same, there is now a much larger storage area and more staff. The Addison has over 17,000 works of art, but only 1,000 are on display at any...