Proceedings of the National Academy of Sciences (PNAS), its scholarly journal. The National Academies Press is the publisher for the National Academies, and makes more than 5,000 publications freely available on its website. From 2004 to 2017, the National Academy of Sciences administered the Marian Koshland Science Museum to provide public exhibits and programming related to its policy work. The museum's exhibits focused on climate change and infectious disease. In 2017, the museum closed and made way for a new science outreach program called LabX. Membership The Academy currently has 2,984 members and international members. Existing members elect new members for life. Up to 120 members are elected every year; up to 30 foreign citizens may be elected as international members annually. The election process begins with a formal nomination, followed by a vetting period, and culminates in a final ballot at the Academy's annual meeting in April each year. Members are affiliated with a section – a specific scientific field – in one of six so-called "classes": (1) Physical and Mathematical Sciences; (2) Biological Sciences; (3) Engineering and Applied Sciences; (4) Biomedical Sciences; (5) Behavioral and Social Sciences; and (6) Applied Biological, Agricultural, and Environmental Sciences. Since its founding, the Academy has elected 6,607 members. Harvard University is associated with the most members (330), some 5% of the all-time total. The top ten institutions, half of which are in the Ivy League, account for nearly 28% of all members ever elected. Facilities The National Academy of Sciences maintains multiple buildings around the United States. The National Academy of Sciences Building is located at 2101 Constitution Avenue, in northwest Washington, D.C.; it sits on the National Mall, adjacent to the Marriner S. Eccles Federal Reserve Board Building and in front of the headquarters of the U.S. State Department. The building has a neoclassical architectural style and was built by architect Bertram Grosvenor Goodhue. The building was dedicated in 1924 and is listed on the National Register of Historic Places. Goodhue engaged a team of artists and architectural sculptors including Albert Herter, Lee Lawrie, and Hildreth Meière to design interior embellishments celebrating the history and significance of science. The building is used for lectures, symposia, exhibitions, and concerts, in addition to annual meetings of the NAS, NAE, and NAM. The 2012 Presidential Award for Math and Science Teaching ceremony was held here on March 5, 2014. Approximately 150 staff members work