Siirt was an especially eminent city at the time of the Abbasid Caliphate. Among the city’s monuments, be sure to visit the 12th century Seljuk Ulu Mosque and the 13th century Asakir Carsi Mosque. At Aydinlar (Tillo), only 6 km from Siirt, the Ibrahim Hakki Mausoleum Complex and nearby private Ibrahim Hakki Astronomical Museum are worth a visit. Siirt produces fine and large pistachio nuts and is known as well for its excellent goat hair blankets and kilims.