The vaulted dome structures of the firmaments of heaven are supported by foundations of pillars.
Enoch 60:11
And the other angel who went with me and showed me what was hidden told me what is first and last in the heaven in the height, and beneath the earth in the depth, and at the ends of the heaven, and on the foundation of the heaven.
Jubilees 19:25
And these shall serve to lay the foundations of the heaven, and to strengthen the earth, and to renew all the luminaries which are in the firmament.