Terrace House, which consisted of seven housing units, connected the upper and lower city. Hermann Vetters undertook the first excavations between 1967 and 1984. Evaluating finds such as coins or pottery allowed the identification of four main building phases. The earliest structures connected to housing in this area are from the 1st century BC; however, these early structures could not be identified over the entire area. After extensive destruction caused by an earthquake in the 3rd quarter of the 3rd century AD, the Terrace House 2 was abandoned as a high-status residential housing unit. (For a more extensive chronology, see Krinzinger 2002; the four building phases in Unit 5: Adenstedt 2005, 12–13.)