city appears to have been within the Hittite sphere of influence, no Hittite artifacts have been found in Troy VI. Also notably absent are sculptures and wall paintings, otherwise common features of Bronze Age cities. Troy VI is also notable for its architectural innovations as well as its cultural developments, which included the first evidence of horses at the site. The language spoken in Troy VI is unknown. One candidate is Luwian, an Anatolian language believed to have been spoken in the general area. Potential evidence comes from a biconvex seal inscribed with the name of a person using Anatolian hierglyphs often used to write Luwian. However, available evidence is not sufficient to establish that Luwian was actually spoken by the city's population, and a number of alternatives, such as Greek and Lemnian-Etruscan, have been proposed. Hittite documents found at Hattusa suggest that literacy existed at Troy and that the city may have had a written archive. The Alaksandu Treaty required King Alaksandu to read its text publicly three times a year, while the Milawata letter mentions that the deposed King Walmu was still in possession of wooden investiture tablets. The archive would likely have been housed in the citadel's innermost precinct, whose remains were pushed over the northern side of the hill during 3rd century construction. Despite attempts to sift through the rubble, no documents have been found. Troy VI was destroyed around 1300 BC, corresponding with the sublayer known as Troy VIh. Damage in the Troy VIh layer includes extensive collapsed masonry and subsidence in the southeast of the citadel, indicative of an earthquake. Alternative hypotheses include an internal uprising as well as a foreign attack, though the city was not burned and no victims were found in the debris. Troy VIIa Troy VIIa was the final layer of the Late Bronze Age city. It was built soon after the destruction of Troy VI, seemingly by its previous inhabitants. The builders reused many of the earlier city's surviving structures, notably its citadel wall, which they renovated with additional stone towers and mudbrick breastworks. Numerous small houses were added inside the citadel, filling in formerly open areas. New houses were also built in the lower city, whose area appears to have been greater in Troy VIIa than in Troy VI. In many of these houses, archaeologists found enormous storage jars called pithoi buried in the ground. Troy VIIa seems