"I'll meet you at the obelisk," is spoken nearly every day in nearly every language in the world.
Standing as it does in the center of St. Peter's Square surrounded by Bernini's Collonade, the Vatican Obelisk is a natural, easily described meeting place.
The Romans were fascinated by things Egyptian and they brought dozens of obelisks to Rome.
There are more than 90 obelisks in Rome today. In Cairo, Egypt, there are three.