Archeoastronomy is the science of ancient star knowledge, time calculation, and often includes ordinary buildings and tools of long gone cultures.

One job of CALENdeRsign is to save this heritage by research and publishing it.

CALENdeRsign already has organized a symposium about a megalithic monument that has a calendrical function and proved archeogeodetic orientation. The symposium proceedings have been published.

SEAC, Europäische Gesellschaft für Kulturastronomie, European Society for Astronomy in Culture. http://www.archeoastronomy.org/
INSAP, The Conferences on The Inspiration of Astronomical Phenomena, https://insap.org/
Gesellschaft für Archäoastronomie e.V. http://www.archaeoastronomie.org/
Zahlreiche Universitäten, Sternwarten und weitere Institutionen widmen sich ebenfalls diesem Thema:
http://sternwarte-recklinghausen.de/astronomie/archaeoastronomie/
http://www.sternwarte-sohland.de/archaeoastronomie.html
http://www.sonn-wend-stein.at/