The Ascension of Jesus (anglicized from the Vulgate Latin section title: Ascensio Iesu) is the departure of Christ from Earth into the presence of God. The well-known narrative in Acts 1 takes place 40 days after the Resurrection: Jesus, in the company of the disciples, is taken up in their sight after warning them to remain in Jerusalem until the coming of the Holy Spirit; as he ascends a cloud hides him from their view, and two men in white appear to tell them that he will return "in the same way you have seen him go into heaven."
Heavenly ascents were fairly common in the time of Jesus, signifying divine approval or the deification of an exceptional man. In the Christian tradition, reflected in the major Christian creeds and confessional statements, the ascension is connected with the exultation of Jesus, meaning that through his ascension Jesus took his seat at the right hand of God: "He ascended into heaven, and is seated at the right hand of God the Father almighty." The Feast of the Ascension is celebrated on the 40th day of Easter, always a Thursday; the Orthodox tradition has a different calendar up to a month later than in the Western tradition, and while the Anglican communion continues to observe the feast, most Protestant churches have abandoned it. The Ascension of Jesus is an important theme in Christian art, the ascending Jesus often shown blessing an earthly group below him to signify his blessing the entire Church.
The world of the Ascension is a three-part universe with the heavens above, a flat earth centered on Jerusalem in the middle, and the underworld below. Heaven was separated from the earth by the firmament, the visible sky, a solid inverted bowl where God's throne sat "on the vaulted roof of earth."(Isaiah 40:22). Humans looking up from earth saw the floor of heaven, made of clear blue lapis-lazuli (Exodus 24:9-10), as was God's throne (Ezekiel 1:26).