The Queen Mary University of London was born of four institutions- Queen Mary College, Westfield College, St. Bartholomew's Hospital Medical College and the London Hospital Medical College. The oldest building on Campus is the former "Peoples Palace", now known as the Queens' Building. The University currently boasts nine thousand students and is one of Central London's few educational institutions to be located on a single campus. The University primarily teaches medicine. More than fifteen hundred of the students at the Queen Mary University of London are post graduates, many of these involved in on-site research projects. The Queen Mary University of London is part of the University of London- which boasts more than 90,000 students. Visitors to the University campus will find several Victorian buildings, a clock tower and one of the most modern Student Union buildings in the country. To many it is the combination of old and new and the single campus structure that makes this a unique place to study in London.