After most of Ireland became independent as the Irish Free State in 1922, many streets had their names changed, with the names of English monarchs, nobility and administrators replaced with Irish patriots. Dublin's main thoroughfare was known as Sackville Street (named after Lionel Sackville, 1st Duke of Dorset), becoming O'Connell Street in 1924. Similarly, Limerick's George's Street (named after George III) was renamed O'Connell Street. Great Britain Street, Dublin became Parnell Street (after Charles Stewart Parnell). Limerick's Brunswick Street (named after the House of Brunswick) became Sarsfield Street. Cork's George's Street (after George I) became Oliver Plunkett Street, after the Catholic martyr Oliver Plunkett.