They keystone or corner stone is Israel:
Matthew 21:42 Jesus said to them, “Have you never read in the Scriptures: ‘The stone the builders rejected has become the cornerstone. This is from the Lord, and it is marvelous in our eyes’? 43Therefore I tell you that the kingdom of God will be taken away from you and given to a people who will produce its fruit. 44He who falls on this stone will be broken to pieces, but he on whom it falls will be crushed.”…