'Built an Altar' in the Bible

Then Joshua built an altar on Mount Ebal for Yahweh the God of Israel,

And the {Israelites} heard [it] said that the descendants of Reuben, Gad, and the half-tribe of Manasseh had built an altar next to the land of Canaan, in the region of the Jordan, on the side [belonging to] the {Israelites}.