The first dynasty recorded historically, thought to have ruled from the mid-16th to mid-11th century BC (Some scholars date the Shang dynasty from the mid-18th to the late 12th century BC.). However, Shang as an archaeological term must be distinguished from Shang as a dynastic one. Earlier stages of the culture known from Anyang have been recognized at sites assigned to the Erligang Phase and, still earlier, the Erlitou phase. So far virtually no inscriptions have been found at these pre-Anyang sites; even if the date of the dynasty's founding were known it would be uncertain to what extent these archaeologically defined phases fall within the Shang period. Thus while the type site of the Erligang phase at Zhengzhou is generally assumed to have been a Shang capital, some archaeologists have argued that the Erlitou phase falls in the time of the Hsia dynasty, traditional predecessor of Shang. The archaeological classification of Middle Shang is represented by the remains found at Erligang (Erh-li-kang) (c 1600 BC) near Cheng-chou (Zhengzhou). The Shang replaced the Hsia (Zia) in c 1500 BC and was overthrown by the Chou in 1027 BC. The Shang dynasty belongs technically to the advanced Bronze Age - with that metal used for tools (socketed axes, knives, etc.), weapons (halberds, spears, and arrowheads) and for the highly ornamented and artistic ritual vessels. There was a fine white pottery and coarser grey wares, wheelmade and occasionally glazed, which clearly derive from the preceding Neolithic pottery. The period's claim to rank as a civilization is supported by the size and complexity of its cities and its use of writing. Two of its capitals have been identified, at modern Cheng-chou and Anyang, both in Honan province near the middle Yellow River. Rich cemeteries provide much of the evidence, particularly the royal tombs at Anyang. Building was mainly in timber on rammed earth foundations; city walls were also of rammed earth. Burial was by inhumation in pit graves with the skeletons extended, some face down. The pictographic writing appears as occasional inscriptions on the bronzes, much more commonly on the enormous number of oracle bones. The Shang was the second of the Chinese dynasties in the Protohistoric Sandai period.