this period. Early classic (300-550 CE) There is less evidence representing this time period than others at Pacbitun. Nevertheless, the Tzul phase of the Early Classic period saw hints of the enlargement of all major Core Zone architecture (for which excavations have been conducted). By now, Pacbitun has an established dynastic ruler, as evident from texts carved on Stela 6 and Altar 3. The site was significant enough to have acquired exotic materials, such as a green obsidian bipoint, imported hundred of kilometers from highland Central Mexico. This eccentric lithic had been ceremonially placed in a ballcourt cache of this date, along with a stemmed, chert, macropoint from the site of Colha, as well as jade, slate and shell carved objects. Late classic (550-800 CE) Site growth continued into the succeeding Coc phase of the Late Classic period. Structures on Plaza A, in particular, show major architectural renewal, increasing their size and height. Judging from the presence and quantity of exotic goods, this was a period of significant site prosperity. The only large, corbel vaulted, masonry tomb from Pacbitun (BU 1-9) dates to this phase, and contained sumptuous funerary remains belonging to an adult (40- to 50-year-old) male individual. The tomb held polychrome decorated pottery, jade and shell jewelry, bone artifacts (likely hollow bone flutes), and a slate-backed pyrite mosaic mirror, while the interred individual and tomb floor were generously covered with cinnabar (red ochre), typically reserved as a sign of Maya royalty.15 By 800 CE, the site population is estimated to have risen to about 1400-1800 persons. Terminal classic (800-900 CE) The last two centuries of occupation at Pacbitun, the Tzib phase of the Classic period, saw a sharp spike in population levels, possibly to 5000-6500 inhabitants within a 9 km2 area, with signs of a parallel intensification of agriculture in the surrounding countryside. Numerous hillsides around Pacbitun have relic traces of lengthy, stone wall constructions, mostly of Tzib phase date, indicative of agricultural terracing. This suggests that the leadership and residents of Pacbitun were attempting to cope with increased population pressure at the site. These final decades also show heightened ritual activity, in the form of abundant ceremonial caches, largely pottery offerings, though these late caches contain fewer exotic materials (shell, jade, obsidian, slate) than in earlier phases of the Classic period. The last pottery cache from Pacbitun generated a radiocarbon date of 860 CE (+/- 40). Subsistence