The shape of Heijo-kyo was a long rectangle which had Suzaku-oji Street dividing Ukyo (west part of capital) and Sakyo (east part of the capital), and further down the Sakyo, Gekyo (extra part in the east part of Heijo-kyo) was constructed on sloping ground.
平城京は南北に長い長方形で、中央の朱雀大路を軸として右京と左京に分かれ、さらに左京の傾斜地に外京（げきょう）が設けられている。