After the sites' being named as a World Heritage Site, the Instituto Nacional de Antropología e Historia, (INAH) pledged millions of pesos for the restoration and preservation of eleven of the monastery sites. Much of the money was targeted to problems caused by humidity in the walls. One of the first projects was to restore the mural work in the Tetela del Volcán monastery. Another early project was to restore the gardens and fields of the Atlatlahucan monastery. These fields now produce avocados and other crops which are sold to help fund maintenance.