Research in the Kaboud mosque, in northwestern city of Tabriz, shows that except one period in the Achaemenid period, the area had perhaps been inhabited from the first millennium BCE till the Sasanid ear.

All parts of the mosque has been explored as the fifth excavations season is drawing to a close. Some parts of a cemetery buried in the area, some bronze items, frit, and semi-precious stones were unearthed in the season.

According to head of the excavation group Alireza Hozhabri Nobari, the items found in the area are indicators of a history from the first millennium BCE up to the Sassanid era; there is just a historical gap in the Achaemenid era from which no relics have been discovered around the mosque.

The diggings, carried out in just 2 hectares of the 5 hectare historical site, led to the discovery of an ancient cemetery and some evidence on urbanization some 3600 years ago. A number of corpses were also found, one of which has been displayed in museum of Tabriz.