Minutely carved and polished stone discs with a figure and motif associated with the cult of the Mother goddess of fertility have also been unearthed in the excavations from Taxila (now in Pakistan), Patna in the state of Bihar and other Mauryan sites. Houses of mud and kiln burnt bricks were by no means rare. A 3.6-meter wide burnt brick wall traced to a length of about 75 m probably endorsed a tank that collected water through inlets. The upper levels have soak wells lined with terracotta rings of Shunga and Kushana periods.