Birkbeck, University of London (formerly Birkbeck College, informally BBK) is a public research university located in London, United Kingdom and a constituent college of the federal University of London. It offers many Master's and Bachelor's degree programmes that can be studied either part-time or full-time, though nearly all teaching is in the evening. It also admits full-time (as well as part-time) students for PhDs. Its staff members have excellent research reputations in subjects such as English, History, History of Art, Philosophy, Psychology, Spanish, Science and Crystallography. It also offers many continuing education courses leading to certificates and diplomas, foundation degrees as well as other short courses. Birkbeck counts 4 Nobel prize winners amongst its former members of staff.