The diagnostic artifact and namesake of this culture is the Northern Black Polished Ware, a luxury style of burnished pottery used by elites. This period is associated with the emergence of Indian subcontinent's first large cities since the decline of the Indus Valley Civilization; this re-urbanization was accompanied by massive embankments and fortifications, significant population growth, increased social stratification, wide-ranging trade networks, specialized craft industries, a system of weights, punch-marked coins, and writing. Scholars have noted similarities between NBP and the much earlier Harappan cultures, among them the ivorydice and combs and a similar system of weights. Other similarities include the utilization of mud, baked bricks and stone in architecture, the construction of large units of public architecture, the systematic development of hydraulic features and a similar craft industry. There are also, however, important differences between these two cultures; for example, rice, millet and sorghum became more important in the NBP culture. The NBP culture may reflect the first state-level organization in the Indian Subcontinent. According to Geoffrey Samuel, following Tim Hopkins, the Central Gangetic Plain, which was the center of the NBP, was culturally distinct from the Painted Grey Ware culture of the Vedic Aryans of Kuru-Pancala west of it, and saw an independent development toward urbanisation and the use of iron. The end of the NBP culture around 200 BCE was marked by the replacement of the NBP ware with a different style of pottery, namely red ware decorated with stamped and incised designs. However, the same cities continued to be inhabited, and the period from c. 200 BCE to c. 300 CE was still "marked by urban prosperity all over the subcontinent," corresponding to the Shunga and Satavahana Dynasties, and the Kushan Empire. NBPW have also been reported from various sites in Southern Thailand which were engaged in maritime trade activity with India in 1st millennium BCE. However, archaeologist Phaedra Bouvet regards these shards as KSK-Black Polished Wares, not linked technically to NBPW, except from their shape and style, produced between fourth and second centuries BCE, but indeed in contact with real NBPW producing populations.
Proto-Northern Black Polished Ware
Proto-NBPW was first reported by Giovanni Verardi in his excavations at Gotihawa in the Terai, recognised as the transitional phase from Black Slipped Ware to Northern Black Polished Ware, which can be identified through its lustrous black surface with red spots, this spots are due to evident problems in the high temperature firing process, and this ware is dated between 12th and 8th centuries BCE, featuring a black section, a thin slip, very thick walls, and the typical thali shape. Rakesh Tewari comments that Verardi has noticed the presence of proto-NBPW at Gotihawa in 900-800 BCE and observed “that Proto-NBPW may exist at all the NBPW sites of the region dated to or earlier than the 9th-8th century BCE”, and Tewari suggests this pottery can be at least two centuries older than c. 800 BCE.
Sites
Some notable NBPW sites, associated with the mahajanapadas, are as follows:
Other sites where Northern Black Polished Ware have been found are Mahasthangarh, Chandraketugarh, Wari-Bateshwar, Bangarh and Mangalkot. Sites in Southern Thailand include Tam Sǔa in La Un district, Kapoe in Kapoe district and Phu Khao Tong in Suk Samran district in Ranong province and at Khao Sam Kaeo in Muang district and Tam Tuay in Thung Tako district in Chumphon province, although they cannot be considered as "classical" NBPW but local KSK-Black Polished Wares produced in Thailand. A number of ancient sites where the NBPW has been found, such as Ayodhya and Sringaverapura, are mentioned in the Hindu epic, the Ramayana.
