THE consideration of labyrinths worked in Roman mosaic pavements leads us on to a very interesting development of the subject which deserves a chapter to itself, namely, the Labyrinth in the Church. Probably the oldest known example of this nature is that in the ancient basilica of Reparatus at Orléansville (Algeria), an edifice which is believed to date from the fourth century A.D. In the pavement near the north-west entrance of the church is the design shown in outline in Fig.