Sonaji is without a doubt the largest and most important Late Pacajes site on the Taraco Peninsula. Readers will recall that this site was first occupied in the Middle Chiripa phase, and came to be the dominant site on the peninsula in the late LF1, continuing as an administrative period in the LF2 and Tiwanaku periods.
Sectors F and G, the Late Pacajes occupations, cover 1.25 and 7.00 ha respectively, with a combined population index value of 455. These areas are somewhat approximate, since a third to a half of the site lies beneath the modern town of Santa Rosa (under the church certainly, and possibly under the plaza as well). The modern town of Santa Rosa therefore seems to have been the principal village on the peninsula in the Early Colonial period. It is also worth noting in this connection that the town of Taraco, the peninsula's modern capitol, was not occupied at all in the Late Pacajes phase. Its preeminence evidently dates to a later period.
To find this site, walk out of the plaza of Santa Rosa toward the lake. Ceramics will become apparent immediately upon passing out of town.