The six kilometre, anti-clockwise layout of the circuit was designed by circuit architectHermann Tilke. The circuit was planned to start adjacent to Azadliq Square, then loop around Government House before heading west along a 1 km straight to thePalace of the Shirvanshahs and Maiden Tower. Here, the track was planned to have a narrow (7.6m) uphill traversal and then circle the Old City before opening up onto a 2.2 km (1.4 mi) stretch along Neftchilar Avenue back to the start line. The circuit was projected to be the fastest street circuit in the world, with a top speed close to 360 km/h and the second longest circuit on the current F1 calendar behind the Circuit de Spa-Francorchamps in Belgium which currently is the longest circuit on calendar.