Complex sentence: At the original site there remain a few brick fragments of the former citadel (where there was once a famous school of architects in the Seljuk Era), along with a mausoleum commemorating the 11th century sufi Abu Fazl (Serakhs Baba).
Split into simpler sentences: At the original site there remain a few brick fragments of the former citadel. In the Seljuk Era a famous school of architects was located in Saraghs, along with a mausoleum commemorating the 11th century sufi Abul Fazl (Serakhs Baba).