The sternal angle, also known as the angle of Louis, is a prominent anatomical feature located at the junction of the manubrium and the body of the sternum. It can be easily felt as a ridge on the chest and serves as an important landmark for medical professionals. This angle typically aligns with the second rib, making it useful for counting ribs during physical examinations. In addition to its anatomical significance, the sternal angle is important in clinical settings. It helps in locating various structures within the thorax, such as the trachea and major blood vessels like the aorta. Understanding the sternal angle aids in diagnosing and treating respiratory and cardiovascular conditions.