Khaje Taj od-Din mausoleum

The Khwaja Tajuddin Mausoleum, sometimes known as Khaje Taj od-Din Mausoleum is a historical religious complex located next to the Agha Bozorg Mosque in Fazel-e Naraghi district of Kashan, Iran. It was built in the 15th century over a Seljuk-era structure by the Timurid dignitary, Khwaja Zaynuddin, around the grave of his brother. It is number 400 on the list of Iran's national monuments.

History
The site of the complex was originally a Seljuk era building. Later on in the 15th century, the Timurid dignitary, Khwaja Zaynuddin, built a religious complex centred around the grave of his brother, Khwaja Tajuddin, who was the minister of the Qara Qoyunlu emir, Jahan Shah. He built a khanqah, mosque and madrasah there as well. However, both the mosque and madrasah do not exist anymore except for the shrine. The building was abandoned in the Safavid era, until 1959 when it received renovations from the daughter of the Chief-of-Staff of the Iranian Armed Forces, Hassan Firouzabadi.

Burials
Aside from Khwaja Tajuddin, two other saints, Shahzadeh Ishaq and Shahzadeh Abu Talib are buried there. They were the sons of Hamzah ibn Musa who was buried in Tabriz at the Imamzadeh Hamzah. One of the mystics from the Nimatullahi order, Hajj Mullah Mohammad Hasan Qutb al-Natanzi, is buried in the remains of the khanqah. Hassan Firouzabadi's daughter, who renovated the mausoleum in 1959, is also buried here.