Soltaniyeh is a historical city located in northwestern Iran, about 340 km west of Tehran. The city is famous for its magnificent dome, which is located in the center of the city and is considered one of the most significant architectural landmarks of Iran.

The dome of Soltaniyeh was built in the early 14th century, during the reign of the Ilkhanate dynasty, and is the largest brick dome in the world. It has a diameter of 50 meters and a height of 25 meters, and its intricate design and decoration reflect the cultural and artistic richness of the period.

The city of Soltaniyeh was the capital of the Ilkhanate empire for a short period, and its impressive monuments and buildings, including the dome and the surrounding buildings, are a testament to the wealth and power of the Ilkhanate dynasty. The city was also an important center of learning, and several scholars and theologians lived and worked there during the 14th and 15th centuries.

Today, Soltaniyeh is a UNESCO World Heritage Site and attracts visitors from all over the world who come to admire the dome and explore the rich history and culture of the region. The city is also known for its beautiful gardens and parks, which provide a peaceful and relaxing atmosphere for visitors.