Until the discovery that Maya stelae depicted kings instead of high priests, the Maya priesthood and their preoccupations had been a main scholarly concern. In the course of the 1960s and over the following decades, however, dynastic research came to dominate interest in the subject. A concept of royal ʼshamanismʼ, chiefly propounded by Linda Schele and Freidel,[1] came to occupy the forefront instead.[2] Yet, Classic Maya civilization, being highly ritualistic, would have been unthinkable without a developed priesthood.[citation needed] Like other Pre-Hispanic Mesoamerican priesthoods, the early Maya priesthood consisted of a hierarchy of professional priests serving as intermediaries between the population and the deities. Their basic skill was the art of reading and writing. The priesthood as a whole was the keeper of knowledge concerning the deities and their cult, including calendrics, astrology, divination, and prophecy. In addition, they were experts in historiography and genealogy.[3] Priests were usually male and could marry. Most of our knowledge concerns Yucatán in the Late Postclassic, with additional data stemming from the contemporaneous Guatemalan Highlands.