👉 The Sheikh Heydar Mausoleum is a 12-sided building with a circular dome 👉 The monument has a rich history and has been renovated several times 👉 The exterior is decorated with blue tiles and inscriptions from the Quran 👉 The interior has 7 tombs, including one separate tomb at the end of the crypt 👉 The complex has undergone several renovations and expansions