SOCAR Tower is a skyscraper in Baku, Azerbaijan. It is the 4th tallest building in Baku and in Azerbaijan. The skyscraper serves as the headquarters of SOCAR (State Oil Company of Azerbaijan Republic). Construction started in 2010 and was completed in 2016, where it became the tallest building in Baku until it was surpassed by the Port Baku Towers. SOCAR Tower is located on Heydar Aliyev Avenue, a long highway from the main airport to downtown Baku, which is visible on the way to the city center. It is one of Baku's major landmarks, along with the Flame Towers.