The Athens Olympic Velodrome, designed by Santiago Calatrava.The Olympic Velodrome is a stadium at the Athens Olympic Sports Complex that was the site of the track cycling events at the 2004 Summer Olympics in Athens, Greece. The stadium, which seats 5,250 - though only 3,300 seats were made publicly available for the games - has distinctive twin roofs covering the stands on each side, designed by Santiago Calatrava. The track, made of Afzelia wood, is 250 m. long and 7.5 m. wide. Construction of the stadium was completed on May 30, 2004, and it was officially opened on July 30, 2004.