The Twin Rooms
The Twin Rooms were adjacent to the Eastern Plaza. As explained, both had the same size and entrance orientation, and were separated from each other by a narrow corridor. We excavated one of them (Room-5), setting up a test unit in the southwestern corner (Figure 7.1). Three main occupational levels characterized this unit. The earliest level was a pre-Inka occupation lying over the natural soil. The cultural material consisted of few sherds that were utilitarian, or in the local Manchachi Slate on Red style (n=10). Because the wall foundations cut into these early strata, it is very likely that this occupation is earlier than the construction of the Cuzcotuyo building.
Later, the first Inka occupation was characterized by an episode of intensive architectural construction. In the room, this took the form of a rough stone pavement mixed with brown clay mortar as a renovation floor, including the construction of the wall foundations (Figure 7.9). In
Figure 7.9. Room-5 western stratigraphic profile in the Cuzcotuyo complex.
this Early Inka occupation, few associated ceramic fragments were recovered, all belonging to the local Manchachi Slate on Red style. This suggests a cultural continuum in relation to the initial period. In the associated floor, we found the remains of a hearth pit lacking stratigraphy and filled with ash and charcoal. This may indicate that this fireplace was used for a relatively short time. AMS C-14 radiocarbon dating placed this event around A.D. 1427-1450, at one sigma error (68 percent confidence) (Figure 5.6; Table 5.1; sample AA36942).
The third occupation related to the Late Inka phase. This involved the construction of a stone platform in the room, filled with a thick layer of yellow clay. Next to it rested a grinding stone, with no other associated artifacts. This last renovation period also marked the architectural formalization of the space. Further, the absence of cultural artifacts suggests that the area was purposely kept clean, perhaps for specialized grain processing and even storage.