I'm working on a project about structures and their historical value. I don't need this information, however, I would like to know and/or have it exposed to people that have wondered the same question.
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You can call it the birthplace of the idea. Merriam-Webster defines birthplace as "place of birth or origin" [link], and one of its examples is "New Orleans is regarded as the birthplace of jazz" [ibid].
we often use cradle as the conceptual word for where an ideology was nurtured (usually by more than one person or over a period of time) for example for civilisations we say
Cradle of civilization https://en.wikipedia.org/wiki/Cradle_of_civilization
it can be used for innovation
Cradle of Innovation http://www.leeds-sdg.com/cradle-of-innovation/