Soltaniyeh is an easy trip from Tehran on the way to Ardabil or Tebriz. Entrance fee was 200,000 rials (6 usd). Inside there are repairs ladders and small array of repairs works. It's possible to climb to the second level and walk around in the inside gallery and than go upstairs to outside circle. There are remains of some very fine tilework on some ceilings. However the building itself is a bit dilapidated. There are many cracks everywere, a thing you probably should expect from 700-old building. Some cracks are covered with simple patches and some with laser ones, which record speed of wall movement. Unfortunately thus impressive dome is substantially the only witness of once very prosperous and bustling trading city.