'Built an Altar' in the Bible

Then Joshua built an altar to the Lord, the God of Israel, in Mount Ebal,

When they came to the region of the Jordan which is in the land of Canaan, the sons of Reuben and the sons of Gad and the half-tribe of Manasseh built an altar there by the Jordan, a large altar in appearance.

And the sons of Israel heard it said, “Behold, the sons of Reuben and the sons of Gad and the half-tribe of Manasseh have built an altar at the frontier of the land of Canaan, in the region of the Jordan, on the side belonging to the sons of Israel.”