The Ark of the Covenant, also known as the Ark of the Testimony, is a chest described in the Book of Exodus as containing the Tablets of Stone on which the Ten Commandments were inscribed. According to some traditional interpretations of the Book of Exodus, Book of Numbers, and the Letter to the Hebrews, the Ark also contained Aaron's rod, a jar of manna, and the first Torah scroll as written by Moses; however, the first of the Books of Kings says that at the time of King Solomon, the Ark contained only the two Tablets of the Law. According to the Book of Exodus, the Ark was built at the command of God, in accordance with the instructions given to Moses on Mount Sinai. God was said to have communicated with Moses "from between the two cherubim" on the Ark's cover.
source:wikipedia\Image by: The Jewish Theological Seminary