'Built an Altar' in the Bible

And Noah built an altar unto the LORD; and took of every clean beast, and of every clean fowl, and offered burnt offerings on the altar.

And he removed from there unto a 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 unto the LORD, and called upon the name of the LORD.

And they came to the place which God had told him of; and Abraham built an altar there, and laid the wood in order, and bound Isaac his son, and laid him on the altar upon the wood.

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