By the May Revolution of 25 May 1810, the first Argentine autonomous government, known as the "Primera Junta", was formed in Buenos Aires. It was later known as the "Junta Grande" when representatives from the provinces joined. These early attempts at self-government were succeeded by two Triumvirates and, although the first "juntas" had presidents, the King of Spain was still regarded as Head of State (as independence had not yet been declared), and the executive power was still not in the hands of a single person.