The Peabody Essex ranks among the top 20 art museums in the United States by measures including gallery space and endowment. Once the Advancement Campaign is complete and the newly expanded museum opens in 2019, PEM will rank in the top 10 North American art museums in terms of gallery square footage, operating budget and endowment. The PEM holds more than 840,000 works of historical and cultural art covering maritime, American, Asian, Oceanic and African art, Asian export art and two large libraries with over 400,000 books and manuscripts.