Mausoleum of Baba Rukn al-Din - Credit: Wikimedia Commons
The Mausoleum of Baba Rukn al-Din (Persian: مقبره بابا رکن الدین) or just Mausoleum of Baba Rokneddin is a mausoleum located within the grounds of the Takht-e Foulad cemetery in Isfahan, Iran. It is number 201 on the list of national monuments of Iran. The mausoleum entombs the remains of the Sufi mystic Masoud ibn Abdullah al-Beyzawi, who is known by his title Baba Rukn al-Din. Read more on Wikipedia
Source: en.wikipedia.org