Very relevant information, indeed there are many artifacts from Shamanism, Zoroastrianism or Tengriism in the Anatolian culture. Also I learned last year from my travel to Erzincan area, that grave stones are a tradition remaining from shaman times. The Akkoyunlu & Karakoyunlu principalities were using sheep as tomb stones. Later, after 15th century, when the religious clergy from Arabian peninsula (Ulema) arrived to Anatolia, they urged to stop and ban this tradition.