The IX monogram or XI monogram is a type of early Christian monogram looking like the spokes of a wheel, sometimes within a circle.
The IX monogram is formed by the combination of the letter "I" or Iota for IHSOYS (Ιησους, Jesus in Greek) and "X" or Chi for XPISTOS (Χριστος, Christ in Greek). The spokes can also be stand-alone, without the circle. These monograms can often be found as ancient burial inscriptions.
The 5th century Byzantine Column of Marcian displays the XI monogram inside a wreath.
Detail of IX monogram on Constantinople sarcophagus, end of 3rd, early 4th century.
Cover of Merovingian sarcophagus, Musée de Saint-Germain-en-Laye.
Merovingian sarcophagus symbol, 6-7th century, Paris. Musée Carnavalet
Slab sarcophagus, Beyazit, Constantinople, 5th century.