Hook Lighthouse
The Hook Lighthouse (; also known as Hook Head Lighthouse) is a building situated on  Hook Head at the tip of the Hook Peninsula in County Wexford, in Ireland. It is one of the oldest lighthouses in the world and the second oldest operating lighthouse in the world, after the Tower of Hercules in Spain. It is operated by the Commissioners of Irish Lights, the Irish Lighthouse Authority, it marks the eastern entrance to Waterford Harbour. The current structure has stood for 846 years as of 2018.
Nova Scotia Lighthouse Preservation Society
The Nova Scotia Lighthouse Preservation Society (NSLPS) is a non profit charitable organization that works to save lighthouses in the province of Nova Scotia, Canada. It is the largest and oldest lighthouse heritage organization in Canada. The society was formed in 1993 by a group of lighthouse supporters who met on a trip to Sambro Island Lighthouse, near Halifax, the oldest surviving lighthouse in North America. The society lists its goals as supporting the preservation and awareness of lighthouses, assisting community groups in leasing or taking ownership of lighthouses, developing research and acting as a watchdog on the state of lighthouses.