Pope Joseph I of Alexandria was the Coptic

Coptic Christianity

The Coptic Orthodox Church of Alexandria is the official name for the largest Christian church in Egypt and the Middle East. The Church belongs to the Oriental Orthodox family of churches, which has been a distinct church body since the Council of Chalcedon in AD 451, when it took a different...

 Pope of Alexandria and Patriarch of the See of St. Mark (831

831

Year 831 was a common year starting on Sunday of the Julian calendar.- Asia :* In this year, an Uyghur Turk sues the son of a Chinese Tang Dynasty grand general who had failed to repay a debt of 11 million government-issued copper coins...

 - 849

849

Year 849 was a common year starting on Tuesday of the Julian calendar.- Asia :* In the Tang Dynasty Chinese capital city of Chang'an, an imperial prince was impeached from his position by officials at court for erecting a building that obstructed a street in the northwesternmost ward in South...

).

According to the History of the Patriarchs of Alexandria

History of the Patriarchs of Alexandria

The History of the Patriarchs of Alexandria is a major historical work of the Coptic Church. It is written in Arabic, but draws extensively on Greek and Coptic sources....

, conditions finally improved in Ethiopia

Ethiopia

Ethiopia , officially known as the Federal Democratic Republic of Ethiopia, is a country located in the Horn of Africa. It is the second-most populous nation in Africa, with over 82 million inhabitants, and the tenth-largest by area, occupying 1,100,000 km2...

, allowing Abuna Yohannes to return to that country to administer its church.

It was Pope Joseph who, on 13 December 841

841

Year 841 was a common year starting on Saturday of the Julian calendar.- Europe :* June 25 – Battle of Fontenay: Louis the German and Charles the Bald defeat Lothar....

 AD, 4 Koiak

Koiak

Koiak , also known as Kiahk, is the fourth month of the Coptic calendar. It lies between December 10 and January 8 of the Gregorian calendar...

 557 AM, finally fulfilled the desire of Saint Pishoy and moved his body as well as that of Saint Paul of Tammah to the Monastery of Saint Pishoy

Monastery of Saint Pishoy

The Monastery of Saint Pishoy in Wadi El Natrun , Beheira Governorate, Egypt, is the most famous Coptic Orthodox monastery named after Saint Pishoy. It is the easternmost monastery among the four current monasteries of the Nitrian Desert....

 in the Nitrian Desert. Up to that date, the bodies of the two saints were at the Monastery of Saint Pishoy at Deir El Barsha.
He is commemorated in the Coptic Synaxarion on the 23rd day of Babah.