Chaldean Catholic Archeparchy of Tehran

The Chaldean Catholic Metropolitan Archeparchy of Tehran () is an Archeparchy (Eastern Archdiocese) of the Chaldean Catholic church (Syro-Oriental Rite) in Iran, with its archiepiscopal see, St. Joseph's Cathedral, in the national capital Tehran. Despite its Metropolitan rank, it has no suffragan.
History.
The archeparchy was established in 1853 in the city of Sanandaj (Sehna, Sinna), Iran for the Iranian Christians in and around Senaya, on territory split off from the Metropolitan Chaldean Catholic Archdiocese of Kirkuk (in Iraqi Kurdistan).
In 1944, the archdiocese moved its headquarters to Tehran, the capital of Iran. 
On 3 January 1966, it lost territory to establish the non-Metropolitan Chaldean Catholic Archeparchy of Ahvaz, also in Iran.
The Assyrian community of Sanandaj gradually migrated to Tehran from 1960 to 1968, lived in the same district of Agha Zaman (now Namak), and frequently visits Sanandaj as their birthplace. 
There are still some Assyrian houses from the early 1900s intact and in use today. 
It enjoyed a papal visit from Pope Paul VI in November 1970.
On 16 March 1971, the Chaldean Catholic Archdiocese of Sehna was renamed the Archdiocese of Tehran.
Diocesan properties.
The Pahlavi School, built in 1916 in the Aqa Zaman district, is no longer there as it has been destroyed for a main street in recent development.