It traces its origins to 1611, when under the Royal Charter granted by King Sigismund III Vasa, the Jesuit College became the first university in Poznań. The Poznań Society for the Advancement of Arts and Sciences which played an important role in leading Poznań to its reputation as a chief intellectual centre during the Age of Positivism and partitions of Poland, initiated founding of the university. The inauguration ceremony of the newly founded institution took place on 7 May 1919 that is 308 years after it was formally established by the Polish king and on 400th anniversary of the foundation of the Lubrański Academy which is considered its predecessor. Its original name was Piast University (Polish: "Wszechnica Piastowska"), which later in 1920 was renamed to University of Poznań (Polish: "Uniwersytet Poznański"). During World War II staff and students of the university opened an underground Polish University of the Western Lands (Polish: "Uniwersytet Ziem Zachodnich"). In 1955 University of Poznań adopted a new patron, the 19th-century Polish Romantic poet Adam Mickiewicz, and changed to its current name.