The most common type of bricks are made from clay. The clay is heated to over 1832°F (1000°C).
Red bricks get their color from the iron used to make them. Bricks made with higher temperature firings are often darker in color too!
The indentation on the surface of a brick is called a frog.
In 200 BC, workers used 8 million bricks to create the Great Wall of China.