Taoiseach of Ireland
Succeeds de Valera as Taoiseach and begins a government focused on economic modernization.
Role range: 1959-1966
Historical biography archive · Updated 2026-11-03
Sean Lemass Biography and Timeline
Follow Sean Lemass through 3 dated historical records for Ireland.
Sean Lemass, historical timeline
A chronological timeline drawn from matching World History Database records.
3Distinct records
1 of 1Page
1959–1965Years on this page
1959
1961
Prime Minister of Ireland
Appointed Prime Minister of Ireland, forms a minority Fianna Fail Government
1965
Meeting with Northern Ireland Prime Minister
Meets Northern Ireland Prime Minister Terence O'Neill in a significant step toward improved cross-border relations.
Role range: 1959-1966
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.