Gonbade Soltaniyeh-Oljayto Tomb (Soltaniyeh Dome)
Conbade (dome) Soltaniyeh was built by Oljayto, Soltan Mohammad Khodabandeh. This building, concerning its architecture, is so beautiful that its bigness and decoration is known in the world. The tomb of Soltan Mohammad Khodabandeh is located inside the mosque. He built this dome as his last resting place. The construction of this building took 9 years, from 704 to 712 A.H.
Sultaniye was one of the important and flourishing commercial cities in Iran. It had many mosques, schools, good hospitals, and many other welfare buildings, and abbeys.
Mirbaha-addin bridge is the oldest and greatest bridge near Zanjan and is known as “pole kohne” and “ejhdahatoo”. This bridge was built over the “zanjanrood” river. It was built by Mirbaha -addin Zanjani in 1312.H. Coincident with “Naser-addin shah ghajar”. This ridge was-according to the bridge building method of this dynasty built from brick, Scraped stones and lime. It is about 106/60m long and 11m high and has been recorded as national monument no.1484.