Sheridan and Delenn sent Babylon-4 back in time 1000 years to serve as a battle station in the earlier war against the Shadows.
The Minbari found Babylon-4 with a Minbari and two Vorlons aboard it. It becomes such an important base of operations that even the Shadows recognize it 1000 years later and try to destroy it. The Minbari man aboard it became their greatest historical leader. The station must have been an important historical place to them.
It should be as important and recognizable to the Minbari as important places are to our past. (e.g. - People today recognize important places like the Great Wall of China, the Taj Mahal, the Tower of London, the Eiffel Tower, and the Great Pyramids of Egypt.)
Given that the Minbari had interstellar spaceflight abilities long ago, they would almost certainly have pictures of B-4.
Did the Minbari recognize B-4 as it was being built? (Hey, those humans are making a copy of our sacred battle station!)
I am looking for answers that have citations from novels, TV series, movies, or interviews with JMS.