The "St. Anthony's Cross," or crux commissa, was actually the most commonly-used cross used by the Romans for crucifixions.
St. Anthony can be identified by the t-shaped, ‘Tao’ cross he grasps in his left hand (also known as St. Anthony's Cross).
The type of cross actually used by Romans for crucifixion is now known as St. Anthony's Cross, shaped like the letter "T", unlike the traditionally depicted Latin cross.
The Tau Cross, also known as St. Anthony's Cross or Crux Commissa and many others, is an ancient and heraldic cross.
We are also told that this fraternity wore a black habit with the letter T in blue on their breasts, this symbol being known as St. Anthony's Cross.
St. Francis adopted St. Anthony's Cross after meeting monks working at a leper house in Assisi.
History also records the use of the Greek Cross, the Maltese Cross, the Celtic Cross, the Calvary Cross, the Lorraine Cross, the St. Andrews Cross, the St. Anthony's Cross and even Double-Cross, itself a cross.