While sister city agreements are formalized at the municipal level rather than the provincial level, the capital city of Tehran acts as the international representative for the region and maintains several significant twin town and sister city agreements to foster cultural and economic exchange.
Tehran's notable sister cities include: * **Seoul**, South Korea (commemorated by Tehran Street in Seoul and Seoul Street in Tehran) * **Beijing**, China * **Moscow**, Russia * **Ankara**, Turkey * **Pretoria**, South Africa * **Havana**, Cuba * **Caracas**, Venezuela * **Los Angeles**, USA (historic agreement established prior to 1979)