The OAKA Olympic Indoor Hall is a multi-purpose arena located in Athens, Greece. Built for the 2004 Summer Olympics, it serves as a venue for various sports events, concerts, and exhibitions. The hall has a seating capacity of around 8,000 and features modern facilities, making it suitable for both athletic competitions and entertainment. Designed by architect Santiago Calatrava, the hall is part of the larger OAKA Olympic Complex. Its distinctive architectural style includes a striking roof structure that resembles a bird in flight. The venue continues to host events and is a significant landmark in the city.