1854: Valentia chosen as the European terminal for the first transatlantic telegraph link.

1866: A permanent connection established between Valentia and Heart’s Content, Newfoundland, Canada.

1868: The Cable Station built and run by the Anglo-American Telegraph Company.

1890s: Valentia site expanded with workshops, signal rooms, and staff housing for more than 50 workers.

1923: Telegraph operations upgraded with improved cable insulation and repeaters.

1966: Centenary celebrated

1969: Telegraph service closed as satellite links replaced cables.

2016: 150-year anniversary prompted a UNESCO World Heritage nomination for the Valentia site.