Bricks

the making of, formed the chief labour of the Israelites in
Egypt (Ex. 1:13, 14). Those found among the ruins of Babylon and
Nineveh are about a foot square and four inches thick. They were
usually dried in the sun, though also sometimes in kilns (2 Sam.
12:31; Jer. 43:9; Nah. 3:14). (See NEBUCHADNEZZAR T0002684.)

The bricks used in the tower of Babel were burnt bricks,
cemented in the building by bitumen (Gen. 11:3).