Seven Sisters (Lubyanka — unverified subterranean association)

Research notes provided for this entry show no reliable evidence linking the phrase "Seven Sisters" to a physical subterranean site in the Lubyanka area of Moscow. The supplied sources treat "Seven Sisters" as either the Pleiades (an open star cluster) or as sister-nymphs in Greek mythology. There are no construction dates, ownership records, incident reports, eyewitness accounts, or folkloric traditions in the provided material that identify or describe subterranean locations in Lubyanka bearing this name. Because the dataset lacks any geographic anchors, coordinates, or primary reports about a Moscow/Lubyanka subterranean site called "Seven Sisters," any claims that such a site exists or is haunted are unsupported by the supplied sources. The only cultural context present in the sources is the broader mythological and astronomical usage of the term "Seven Sisters," which does not establish a local Moscow tradition or site-specific phenomena.