Is this the gate to Heavenly Jerusalem or is it the door where the Holy Grail is to be found. It is interesting in Lambert Saint de Omer's map of Heavenly Jerusalem there is a door like the one above. Lambert made the map from Geoffrey de Saint Omer one of the original Knight Templars that found the treasures in Solomon's stables in Jerusalem. The Red Door symbolizes the Rose door.

Closeup of red door! |
In ancient time a rose was placed outside a door as a signal for secrecy.
Do you want to open that door? It is up to you to find the Holy Grail.
http://www.georgesmart.com/ktc2c3.htm
http://www.theme-party-palace.com/rose-color-symbolism.html
|