According to my research as to artifacts on the moon,- yes this is a fact indeed.
These ”structures” are the ”left-overs’ ‘of a human civilization dating back countless eons ago
during a previous incarnation of that cosmic Planetary Being who takes incarnation within a planetary sphere in the same way the spiritual Ego in man take incarnation within many types of human forms provided according to karma , atavism , occult heredity , and so on , and on a smaller scale ,- however the analogy is clear.
Those who study Theosophy and the Ageless Wisdom Teachings are aware that the moon we see in the heavens is now a dead corps ,- the decaying body of our planetary Logo’s last incarnation,- which has , at times , been detrimental in the spiritual evolution here on Earth .
As a rotting body so near the earth , the moon has always been a source of evil and lower astral impulses that can assist those deeply immersed in the practise of black magic ,- and those even darker Rites of Necromancy ,- the most dark and most cruel forms of black magic.
During the moon chain , a very mysterious event took place of which not much can be said , suffice it to say it retarded spiritual evolution on Earth. When the Planetary Spirit takes on incarnation on each globe it’s past and cosmic karma follows in the same way ,- on a smaller scale , how karma follows us , Good or bad .
We all must face the ”dweller on the threshold” , Each Planetary Spirit has it’s ”Cosmic Dweller on the Threshold ”and working out karma , good or bad ,hence the joy and suffering of humanity itself , and the planet itself .
Here are links to an ocean of data on this very topic ,
http://www.levir.com.br/theosophy.php A Theosophical Library of Knowledge
https://www.youtube.com/watch?v=vSOG2LyYXqE Return of the Christ- 5 stars
http://makara.us/04mdr/01writing/03tg/vol3intro/03_toc.htm Astrological Interpretations of Famous People
by Ray, Sign and Life Emphasis
http://www.levir.com.br/theotext.php?cod=00127 Concerning Social Conditioning.