Linked from
The 11 pages that link to Heijō-kyō, each with the reason it gives.
Empress KōkenRelated: It was the political center from which Kōken governed.
Empress GenmeiBroader topic: Genmei moved the court here from Fujiwara-kyō.
TenpyōRelated: The imperial court governing during Tenpyō was based at Heijō-kyō.
Tenpyō-jingoRelated: The imperial court governing during Tenpyō-jingo was based at this capital.
Tenpyō-kanpōRelated: It was the political center during Tenpyō-kanpō.
KeiunRelated: Its establishment followed Keiun by two years and inaugurated the Nara period.