'Built an Altar' in the Bible

And Noah built an altar to LORD, and took of every clean beast, and of every clean bird, and offered burnt offerings on the altar.

And LORD appeared to Abram, and said, I will give this land to thy seed. And there he built an altar to LORD, who appeared to him.

And he moved from there to the mountain on the east of Bethel, and pitched his tent, having Bethel on the west, and Ai on the east. And there he built an altar to LORD, and called upon the name of LORD.

And Abram moved his tent, and came and dwelt by the oaks of Mamre, which are in Hebron, and built an altar there to LORD.

And he built an altar there, and called upon the name of LORD, and pitched his tent there. And there Isaac's servants dug a well.