Perhaps by counting the bodies?
On July 20th, 1864, the shrine was opened, and remains of the Three Kings and the coins of Philip I, Archbishop of Cologne were discovered. An eyewitness report reads:
"In a special compartment of the shrine now there showed - along with remains of ancient old rotten or moulded bandages, most likely byssus, besides pieces of aromatic resins and similar substances - numerous bones of three persons, which under the guidance of several present experts could be assembled into nearly complete bodies: the one in his early youth, the second in his early manhood, the third was rather aged.
http://en.wikipedia.org/wiki/Shrine_of_the_Three_Kings_at_Cologne_Cathedral
A Liberal (Christian?) looks at the art and sees the Liberal Jesus. I see the same Lord finally recognized by Constantine. But the faith of the early Christians expressed itself in symbols not likely to alarm the local pagans, so the Shepard is a common motif. The reviewer buys the liberal claim that Christianity was totally trans formed by Constantine, that the Nicene Council pronounced him God, abruptly departing from previous views of Jesus. One has to have read the literatures as well as the graphic arts to understand the change one sees here, from understated symbolism to imperial symbolism. IAC. it is perfectly clear that early Christian art is very like the Jewish art of the period, and often expressed Christian ideas in Jewish themes. By golly, looked the New Testament itself and one sees the same things.