OAKA, or the Olympic Athletic Center of Athens, is a multi-sport complex located in Athens, Greece. Built for the 2004 Summer Olympics, it includes various venues such as the main stadium, an indoor arena, and facilities for swimming and athletics. OAKA serves as a hub for sports events and activities, promoting physical fitness and community engagement. The complex was designed by the renowned architect Santiago Calatrava, known for his innovative and modern architectural style. OAKA has hosted numerous international competitions and continues to be a significant site for sports in Greece, contributing to the country's athletic culture and legacy.