Thirteen principles of faith

In his commentary on the Mishnah "All Israel have a share in the World to Come," the Rambam formulated thirteen foundations of Jewish belief: Hashem's existence, unity and incorporeality, His eternity, that only He is to be worshipped, prophecy, the unique prophecy of Moshe, the Divine origin and permanence of the Torah, Hashem's knowledge of our deeds, reward and punishment, the coming of Moshiach, and the resurrection of the dead. They became the basis of the Ani Ma'amin and the Yigdal hymn.