In Keshavananda Bharti’s case, the Supreme Court held that fundamental rights are unamendable. This means that the Parliament cannot amend or take away the fundamental rights guaranteed by the Constitution. The case was a significant turning point in Indian constitutional history as it established the concept of basic structure doctrine, which states that there are certain core principles and values of the Constitution that cannot be altered by amendments. The Supreme Court also held that although the Parliament has the power to amend the Constitution, it cannot destroy its basic structure. Therefore, any amendment that violates or alters the basic structure of the Constitution would be considered invalid. This landmark decision ensures the protection of fundamental rights in India.