Thomas et al. (2007) identified earthquake destruction (Earthquake VI) within a collapse layer, which they dated to the 4th century CE but prior to the southern Cyril Quake of 363 CE. In describing the Phase 2 layer below this collapse, they established a terminus post quem of ca. 320 CE. They observed that “during the early fourth century, the monumental building was expanded and concluded with the final addition of Rooms 11 and 12 constructed after ca. A.D. 320,” and further noted that “the upper sequences of floors contained Early Byzantine pottery of the mid to late fourth century.”

A terminus ante quem is provided by 363 CE, when the southern Cyril Quake is presumed to have caused the damage attributed to Earthquake V. Thomas et al. concluded that “this seismic event must have occurred at some point in the mid to late fourth century A.D. but before the final extensive collapse of the complex in Earthquake V [363 CE].”