The Athens Olympic Sports Complex, also known as OAKA, is a multi-sport complex located in Athens, Greece. It was built for the 2004 Summer Olympics and features several venues, including the main stadium, the Athens Olympic Stadium, and the Aquatic Center. The complex is designed to host various sporting events and has a capacity of over 70,000 spectators. In addition to the Olympic events, the complex is used for concerts, exhibitions, and other cultural activities. The OAKA is an important landmark in Athens and serves as a symbol of the city's commitment to sports and recreation.