Definition of ancient light
: a window or other opening that has been used 20 or more years without interruption and is therefore protected at common law against obstruction by an adjoining holder
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“Ancient light.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ancient%20light. Accessed 26 Jan. 2022.
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Time Traveler for ancient light
The first known use of ancient light was in 1718
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