After the death of Hosain, they chose for their Imam Mahommed b.
In the centre of the eastern side of the quadrangle two gigantic doors were thrown open to admit the people into the adytum or inner mosque (shrine) where is the marble tomb of Imam Reza, surrounded by a silver railing with knobs of gold.
The imam died in March 819 in the village Sanabad near Tus, some miles north-west of Meshed.
The hidden imam of the common Shiites is, however, the twelfth imam, Mahommed Abu`l-Qasim, who disappeared mysteriously in 879.
The little port of Matrah, immediately contiguous to Muscat, offers the only opportunity for penetrating into the interior by the wadi Kahza, a rough pass which is held for the sultan or imam of Muscat by the Rehbayin chief.