Ali ebn-e Sahl mausoleum - Credit: Wikimedia Commons
The Ali ebn-e Sahl mausoleum is a historical mausoleum in Isfahan, Iran. The mystic Abolhassan Ali ebn-e Sahl Azhar Esfahani lived in the era of the Al-Mu'tadid, the Abbasid caliph. He had a khanqah and a school in the north of the Toghchi cemetery. He died in 894 in Isfahan and was buried in his khanqah. Read more on Wikipedia
Source: en.wikipedia.org