There are three Churches of the Ascension built on the Mount of Olives, and this chapel (now a mosque) claims to be the oldest. Its foundations date back to the time of Poimenia at the end of the fourth century, but, like the Church of the Holy Sepulchre, the current structure is of crusader origins.

Luke Chapter 24

50 Then he led them out as far as Bethany, and lifting up his hands he blessed them. 51 While he blessed them, he parted from them, and was carried up into heaven. 52 And they returned to Jerusalem with great joy, 53 and were continually in the temple blessing God. 

The Revised Standard Version, (New York: Oxford University Press, Inc.) 1973, 1977.