In Edinburgh, Scotland, there is a public institution called Edinburgh Napier University. It boasts more than 17,000 students from more than 100 different countries, including nearly 5,000 international students. The decimal point and logarithms were invented by John Napier, who was born in the ancient tower house of Merchiston Castle (the location of the University's Merchiston campus) in 1550. Napier Technical College was established in 1964 and is named after him. Currently, Merchiston Castle's tower has a statue of him. The college changed its name to Napier College of Science and Technology in 1966. It joined with the Edinburgh College of Commerce, which is located in Sighthill, in 1974 to create Napier College of Commerce and Technology, which became into a Central Institution in 1985. In 1986, the college changed its name to Napier Polytechnic and bought the Craiglockhart buildings of the former Hydropathic hospital. The organization changed its name to Napier University in June 1992. The new University sign at Merchiston was unveiled by Lord James Douglas Hamilton and the then-Principal, Professor William Turmeau, in front of more than 700 staff members and students. Napier University purchased the Craighouse Campus in 1994. The Scottish Borders College of Nursing and Lothian College of Health Studies merged in 1996 to create a new Faculty of Health Studies within the university. It changed its name to Edinburgh Napier University in February 2009 The Queen's Anniversary Prize 2009 for Higher and Further Education was given to Edinburgh Napier. The University's Building Performance Center's contribution to enhancing sound insulation between attached homes was recognized with an award for "Innovative housing building for environmental benefit and quality of life." The University's motto, Nisi sapientia frustra, which translates to "Everything is in vain without knowledge," is similar to the City of Edinburgh's motto, Nisi Dominus frustra (meaning "Everything is in vain without the LORD"). In February 2009, Edinburgh Napier's Tartan was introduced along with the name change. The Chief of Clan Napier hailed the new University tartan, which was previously worn by the institution.