The bottom-right cornerstone of "The Hinge" is a lion. There are many references to lions in the Bible, but it is included in this painting specifically because it is an ancient symbol associated with the Israelite tribe of Judah & one of the names of Christ (This symbol is one of my creations...influenced by medieval depictions of lions in heraldry).
In Genesis 49:9 you can see the earliest reference of a lion in association with the tribe of Judah.
In Matthew 1:3-16 you can see the genealogy of Christ and his association with the tribe of Judah.
In Hebrews 7:14, the author clarifies this connection.
In Revelation 5:5 the name "Lion of Judah" is used in reference to Christ.
Jerusalem's Coat of Arms