Where was An Invisible Sign filmed?
2010 film directed by Marilyn Agrelo
An Invisible Sign (2010) was filmed in Tarrytown and Steiner Studios, 2 places named in its Wikipedia article's Production section, in the United States. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.
Places per Wikipedia's Production section
Wikipedia’s Production section names 2 places. Each links to the sentence that says so.
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Towns & cities
Tarrytown
United States
Village in town of Greenburgh, Westchester County, New York, United States
“Filming locations included Steiner Studios and Tarrytown, New York.” Wikipedia
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Studios & sets
Steiner Studios
United States
Film studio and sound stage in New York