The Pontifical Academy of Sciences (Pontificia accademia delle scienze, Pontificia Academia Scientiarum) is a scientific academy of the Vatican City, established in 1936 by Pope Pius XI. Its aim is to promote the progress of the mathematical, physical, and natural sciences and the study of related epistemological problems. The Accademia Pontificia dei Nuovi Lincei ("Pontifical Academy of the New Lynxes") was founded in 1847 as a more closely supervised successor to the Accademia dei Lincei ("Academy of Lynxes") established in Rome in 1603 by the learned Roman Prince, Federico Cesi (1585–1630), who was a young botanist and naturalist, and which claimed Galileo Galilei as its president. The Accademia dei Lincei survives as a wholly separate institution. The Academy of Sciences, one of the Pontifical academies at the Vatican in Rome, is headquartered in the Casina Pio IV in the heart of the Vatican Gardens. Cesi wanted his academicians to adhere to a research methodology based upon observation, experimentation, and the inductive method. He thus called his academy "dei lincei" because its members had "eyes as sharp as lynxes," scrutinizing nature at both microscopic and macroscopic levels. The leader of the first academy was the famous scientist Galileo Galilei. Academy of Lynxes was dissolved after the death of its founder, but was re-created by Pope Pius IX in 1847 and given the name Accademia Pontificia dei Nuovi Lincei ("Pontifical Academy of the New Lynxes"). It was later re-founded in 1936 by Pope Pius XI and given its current name. Pope Paul VI in 1976 and Pope John Paul II in 1986 subsequently updated its statutes. Since 1936, the Pontifical Academy of Sciences has been concerned both with investigating specific scientific subjects belonging to individual disciplines and with the promotion of interdisciplinary co-operation. It has progressively increased the number of its academicians and the international character of its membership. The Academy is an independent body within the Holy See and enjoys freedom of research.