The Mausoleum of Tahir and Mansur is located in the historic city of Kashan, Iran. It is named after two descendants of the Shi'a imam Musa ibn Ja'far whose remains are said to be buried there. The earliest inscription is 934 AH (1523-1524 CE). As is common in shrines, many later repairs were made to the building.

Sources:

Oksana Beheshti. Travel Guide to Esfahan, Kashan and More, 184. Tehran: Rowzaneh, 2003.