The vitrified surfaces do not only show up in the joints, however. People who have studied the ruins of the Temple also found interior stones with an outside layer of reflective material. In some instances, the vitrified surfaces had been removed in a rather crude way with a chisel and hammer. Historians who studied the entire time span of the building and walls surmise this may have happened in order to paint or stucco them once the Spanish colonized the area.
Other interior surfaces made of stone were carved with precise niches, grooves, and holes that extended straight into the granite blocks. While these do not have obvious purposes at this late date, it is quite common to assume that they were used to hang decorative items such as plaques, banners, or even figurines or statues. The holes range in depth from just four centimeters to 50 centimeters deep.