With the coming into existence of the Irish Free State in December 1922, Leinster House, the headquarters of the Royal Dublin Society, located next door to the Royal College of Science, became the provisional seat of the Free State's parliament, "Oireachtas Shaorstát Éireann". The Executive Council of the Irish Free State immediately commandeered part of the college as temporary office space. Two years later, the Free State decided to buy Leinster House outright from the RDS. Government usage of part of the Royal College of Science also became permanent.