[2] Prior to the opening of that lighthouse in 1841,[3] sailors navigating the Strait of Gibraltar near Europa Point were dependent upon the light emitted by the Shrine of Our Lady of Europe.
The sailors showed their gratitude and encouraged continued burning of the lights in the chapel and adjacent tower by leaving supplies of oil at the Roman Catholic shrine.
While the shrine's tower is not listed in nautical publications, its history as an aid to navigation in earlier centuries is sufficiently well known that many consider it "Gibraltar's first lighthouse.
Publication 113, of the United States National Geospatial-Intelligence Agency (NGA), is also known as the List of Lights, Radio Aids, and Fog Signals.
[9] The ARLHS World List of Lights (WLOL) is published by the Amateur Radio Lighthouse Society.