Kocaeli Congress Center, which can also be used for special events, was built by renovating the old Mannesmann factory buildings in the SEKA Park region with existing materials within the scope of the industrial transformation project. Kocaeli Congress Center, which is one of the most important congress centers of Eastern Marmara, has the main congress hall for 1,300 people, foyer and exhibition halls, 4 multi-purpose halls for 120 people, 4 halls for 40 people, a senate hall for 60 people and administrative offices, 2 There is a 460-person wedding hall, meeting rooms of different scales, workshops and catering units.