Why do we honor the Cross with such reverence that we make mention of its power in our prayers after asking for the intercession of the Mother of God and the Heavenly Powers, before asking for that of the Saints, and sometimes even before asking for that of the Heavenly Powers?
Because after the Saviour’s sufferings, the Cross became the sign of the Son of Man, that is, the Cross signifies the Lord Himself, incarnate and suffering for our salvation.
~Saint John of Kronstadt, My Life in Christ

As an American Roman Catholic I am not familiar with the diagonal cross bar and the short cross bar at the top. Can you edify my of its signification?
Hi Tom,
according to the Orthodox Chruch in America’s website:
hope this helps…
handmaid leah