Cúpula de Soltaniyeh

This UNESCO World Heritage site was constructed between 1302 and 1312 as the mausoleum for Öljaitü, the ruler of the Ilkhanid dynasty. Standing at 49 meters tall, the structure is recognized as the world's largest brick dome and the third-tallest dome in existence. It has been recognized as a UNESCO World Heritage site since 2005.

The monument is a landmark of Ilkhanid architecture, distinguished by its massive double-shelled brick dome. The exterior and interior are decorated with intricate Islamic tile work and decorative patterns. Its architectural design and engineering served as a significant influence on later Islamic structures, including the Taj Mahal.

The building is a primary example of 14th-century Persian engineering and is open to the public. It is a significant historical landmark that serves as a notable destination for those interested in Islamic architectural history.