Leiden University at the university. The learning and reputation of Jacobus Gronovius, Herman Boerhaave, Tiberius Hemsterhuis and David Ruhnken, among others, enabled Leiden to maintain its reputation for excellence down to the end of the 18th century. At the end of the nineteenth century, Leiden University again became one of Europe's leading universities. At the world’s first university low-temperature laboratory, professor Heike Kamerlingh Onnes achieved temperatures of only one degree above absolute zero of −273 degrees Celsius. In 1908 he was also the first to succeed in liquifying helium and can be credited with the discovery of the superconductivity in metals. The
Leiden Law School result of this policy, the old Kamerlingh Onnes Laboratory, named after physicist Heike Kamerlingh Onnes, was restyled into a new home for the law school; the move was completed in 2004. A reorganisation of the faculty, which began in the 1980s, realigned the faculty's focus to major fields such as civil, corporate, notarial, criminal, European and international law; these areas remain Leiden's traditional areas of scholarly strength. The Cleveringa Institute was established in 2001 to maintain the integrity of teaching and intellectual rigour in courses. The faculty's research was moved to the E.M. Meijers Institute in 1997 and emphasised interdisciplinary