The term Pur (Devanagari:पुर) occurs approx. 30 times in the Rig Veda. It is often translated as city, castle or fortress.
In the Rig Veda, there are also purs made of metal (purās ayasīs in 10.101.8). In Aitareya Brahmana, there is copper/bronze, silver, and golden pur.
Pur and Pura
"Pur" and" Pura" are suffixes meaning "city" or "settlement", used in several place names across the Indian subcontinent, Southeast Asia, Afghanistan and Iran. The word Pura is the oldest Sanskrit language word for "city", finds frequent mention in the Rigveda, one of the four canonical sacred texts of Hinduism, most dating between c. 1500–1200 BCE. However in later Vedic literature it also means fortress or rampart. These days pura is often used for a mohalla (neighbourhood).