'Pillars' in the Bible

and [when] James and Cephas and John--those thought to be pillars--acknowledged the grace given to me, they gave to me and Barnabas the right [hand] of fellowship, in order that we [should go] to the Gentiles and they to the circumcision.

And I saw another powerful angel descending from heaven, wrapped in a cloud, and a rainbow over his head, and his face [was] like the sun, and his feet [were] like pillars of fire,