I have records of hundreds of men from throughout Lebanon who applied for US citizenship in St. Louis, MO.
On the line entitled, "Other visible distinctive marks," the overwhelming majority were shown to have tattoo's, usually located on the hand. Only one tattoo was described - a cross.
During the Crusades, soldiers from Europe often had a cross tattooed on their hand, so that in the event of death, they would be afforded a Christian burial. More recently, Christians from within Lebanon would make a pilgrimage to Jerusalem, much the same as Muslims to Mecca. These people often got a tattoo of a cross to commemorate the visit, and often an accompanying date or year.