This veil, or curtain, separated the Holy Place from the Most Holy Place in the Jewish temple at Jerusalem. Only the high priest was allowed behind this curtain, and he could go into the Most Holy Place only once a year-on the Day of Atonement-to offer sacrifices to atone for the sins of the people (Lev 16:34).
At the very moment when Jesus died, this large curtain was split in two by a miraculous act of God. This signified that Jesus had paid the price for human sin and that all people had access to His love and grace (Heb 10:19-22).
MARK 15:38 – 38 And the veil of the temple was rent in twain from the top to the bottom.