Normally, a chain hangs at the front of the main door of the mosque. When chain is at it’s lowest level, it means that access is not allowed. Persian tiles are used to enhance the beauty of the entrance. After entering through the main door, a corridor leads to the courtyard of the mosque.
However, just before the courtyard, to right side there is a room which show few models and history of the mosque. It has a current model of the mosque. A photos shows that very first mosque at current site was built in 772 and in 840 the mosque was demolished and a new mosque was built on an area of one hectare. Another one shows how the Jame Mosque of Isfahan had looked like in the 13th century.