Rew-Ardashir is only Metropolitan titular archbishopric of the Chaldean Catholic Church (Chaldean Rite in Syriac language).
It used to be an eparchy (Eastern Catholic diocese) in that rite-specific Catholic church.
The former residential archbishopric had its see in Zaydūn (Iran).
It was nominally restored as a titular see in 1970 and is vacant after having only one incumbent:
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