Information on ancient and medieval era dressing traditions of women in Hinduism is unclear. Textiles are commonly mentioned in ancient Indian texts. The Arthashastra (~200 BCE to 300 CE) mentions a range of clothing and plant-based, muslin-based, wool-based textiles that are partially or fully dyed, knitted and woven. It is, however, uncertain how women wore these clothing, and scholars have attempted to discern the dress from study of murti (statues), wall reliefs, and ancient literature. In ancient and medieval Hindu traditions, covering the head or face was neither mandated nor common, but "Ushnisha" – a regional ceremonial occasion headdress is mentioned, as is Dupatta in colder, drier northern parts of Indian subcontinent.