The first attempts of having a Brazilian science establishment were made around 1783, with the expedition of Portuguese naturalist Alexandre Rodrigues, who was sent by Portugal's prime minister, the Marquis of Pombal, to explore and identify Brazilian fauna, flora and geology. His collections, however, were lost to the French, when Napoleon invaded, and were transported to Paris by Étienne Geoffroy Saint-Hilaire. In 1772, the first learned society, the Sociedade Scientifica, was founded in Rio de Janeiro, but lasted only until 1794. Also, in 1797, the first botanic institute was founded in Salvador, Bahia. In the second and third decades of the twentieth century, the main universities in Brazil were organised from a set of existing medical, engineering and law schools. The University of Brazil dates from 1927, the University of São Paulo - today the largest in the Country - dates from 1934.