Saint Prokhore the Georgian, a descendant of the noble Shavteli family, was born at the end of the 10th century and grew up in a monastery. When he reached manhood he was ordained a hieromonk and labored for one year at the Lavra of St. Sabbas in Jerusalem. Then, with the blessing of his spiritual father Ekvtime Grdzeli, he began the reconstruction of the Holy Cross Georgian Monastery near Jerusalem.
According to tradition, at this spot Abraham’s nephew Lot planted three trees—a cypress, a pine, and a cedar. Eventually these three trees miraculously grew into one large tree. When the Temple of Solomon was being built, this tree was cut down but left unused. It is said that the Cross on which Christ our Savior was crucified was constructed from the wood of this tree.
In the 4th century, the land on which the miraculous tree had grown was presented to Holy King Mirian, the first Christian king of Georgia. Then in the 5th century, during the reign of Holy King Vakhtang Gorgasali, the Holy Cross Monastery was founded on that land. The monastery was destroyed several times between the 7th and 9th centuries. [...]
And if this tradition is accurate, what kind of tri-mingled tree did these three trees turn into? Must have been a rather tall conifer type tree. I have seen a mass of trees mingle their root systems to form a "single" tree, but to look at them they appear to be several unique trees with a common base.