Although largely a commuter school, PSU houses around 3,000 undergraduate and graduate students, and has ten residence halls. Its largest include University Pointe, a sixteen-story apartment building operated by American Campus Communities built in 2011, and Ondine, a fifteen-story high rise. Older residence halls, many of which were originally apartment buildings that were purchased by the university, include Blackstone, built in 1930, and Montgomery Court, built in 1916; other older residence halls include St. Helens Court, built in 1927; the art deco Parkway Manor, built in 1931; and Blumel Hall, built in 1986. Other residence buildings were constructed post-millennium, including the Stephen Epler Hall (built in 2003) and the Broadway (built in 2004). Further steps toward increasing housing capacity — and university control over its own housing — are being taken with plans for further construction, and with Portland State taking over management of the residence halls it currently owns. In March 2007, Portland State University took over the managing of the on-campus housing at Portland State University. College Housing Northwest, which has managed the on-campus housing buildings (including the Broadway, Stephen Epler Hall, West Hall, King Albert Hall, St. Helens, Montgomery Court, and Ondine) for over 30 years, will still maintain its off-campus housing (including Goose Hollow, The Palidian, The Cambrian, and Clay). Optional residential and social opportunities exist with a small but active Greek system, which includes:  Portland State University has numerous pieces of public art around campus from renowned local, national and international artists, such as Frederic Littman, Thomas Hardy, Ken MacKintosh & Lillian Pitt, Emily Ginsburg, Harrell Fletcher with Avalon Kalin, Linda Stein, John Aiken, and Ed Carpenter. There are several art galleries and spaces for exhibiting art at PSU: the MK Gallery, AB Gallery and Sugar Cube Gallery within PSU's School of Art + Design; the Broadway Gallery in Lincoln Performance Hall; and the Littman + White Galleries in Smith Memorial Student Union. Littman + White Galleries are among the United States' only student-run contemporary art galleries. In 2018, the Autzen Gallery at Neuberger Hall was closed amid restorations for the building, and will be replaced with the Jordan Schnitzer Museum of Art at Portland State University. The university has made great efforts to make its buildings environmentally sustainable, both in its new architecture as well as through renovation of its older buildings.