BKA / Bahadır Kul Architects is an architectural office that focuses on architecture from urban designs to public use architecture. Founded and directed by Bahadır Kul, BKA currently employs some 50 people with offices in İstanbul, Kayseri and Baghdad. Kayseri City Stadium, Kayseri Intercity Bus Terminal, Kadir Has Convention and Sports Center, Nevşehir Intercity Bus Terminal are BKA brand projects which are established in the first office in Kayseri in 2003.

Apart from these, BKA also put the signature on various projects as in transportation, sports, cultural and public buildings. BKA established its second office in İstanbul in 2010 and continues the architectural works actively with national and international projects.