Yildirim Bayazit Kulliye (Center): The complex constructed in between 1390 and 1399 in Yildirim district at the east of the city is composed of a mosque, theology school, darussifa (cure house), Turbe, inn, hamam, charitable establishment, pleasure – house, kitchen, service rooms and stable structures. The mosque at the middle of the kulliye is one of the most monumental example of the sided mosques, and it has a cure house dated 1399. Ottoman architecture had started to find a unique building structure style with this mosque. The Turbe, which is single structured with its inscription is on the north east of the mosque. The Turbe which was constructed to Mimar Ali bin Huseyin by Yildirim Bayezit’s son Suleyman Han in 1406, is the first sample of Ottoman Turbes with portico.