[1] The mausoleum entombs the remains of the Sufi mystic Masoud ibn Abdullah al-Beyzawi, who is known by his title Baba Rukn al-Din.

[1][2] The original construction of the mausoleum dates back to the Ilkhanate period.

[2] Baba Rukn al-Din's tomb was the only surviving structure from the Ilkhanid era, and this remains true in the present time.

[2] The mausoleum is made with bricks, while the exterior of the building is covered in decorative tiles.

[1][2] Inside the mausoleum, there are alcoves on each side of the structure (save for the entrance).