en Itza to his heirs. The Thompsons sold the hacienda to tourism pioneer Fernando Barbachano Peon.
There have been two later expeditions to recover artifacts from the Cenote Sagrado, in 1961 and 1967. The first was sponsored by the National Geographic, and the second by private interests. Both projects were supervised by Mexico's National Institute of Anthropology and History (INAH). INAH has conducted an ongoing effort to excavate and restore other monuments in the archaeological zone, including the Ossario, Akab D�zib, and several buildings in Chich�n Viejo (Old Chichen).
In 2009, to investigate construction that predated El Castillo, Yucatec archaeologists began excavations adjacent to El Castillo under the direction of Rafael (Rach) Cobos
