Although in Denpodo, foundation stones were used under the pillars, seldom seen in buildings of those days, and at Heijo-kyo (the ancient capital of Japan in current Nara) in the Nara period a hottate bashira (an earth fast post) was adopted in the most of the buildings which had been succeeded since the Kofun period (tumulus period).
伝法堂は、当時の建築としては珍しく、柱に礎石を用いているが、奈良時代の平城京では、ほとんどの建物が古墳時代と同様な掘立柱であった。