Dome of Soltaniyeh

The Dome of Soltaniyeh was built between 1302 and 1312 in Soltanije in Iran and was originally intended for Ali ibn Abi Talib (cousin and son-in-law of Mohammed) and his son Hossein. In the end, the Mongol sultan Öldscheitü Chodabande was buried in it.
The octagonal structure is spanned by a round brick dome, one of the largest in the world with a height of 35.1 metres. The dome is currently being restored, which is why unfortunately the entire interior has been scaffolded. 
Originally the whole building was covered with blue and turquoise tiles. Also of the eight minarets only little is preserved.
Since 2005, the Öldscheitü Mausoleum has been a UNESCO World Heritage Site.