The Order comprises five classes: •
Knight with the Collar (GCCPO): who wear a gold chain around their shoulders which is decorated with the papal
tiara and two doves, and on the breast a large star. It is the highest active
papal decoration, and is reserved for
heads of state. •
Knight/Dame Grand Cross (GCPO): who wear a wide dark blue silk
ribbon (sash) bordered with red which extends
saltire-wise from the left shoulder to the right side where the insignia of the order is suspended by a
rosette, and on the breast a large diamond-studded star. It is commonly awarded to the ambassadors accredited to the Holy See. •
Knight/Dame Commander with Star (KC*PO/DC*PO): who in addition to the badge wear a star of smaller design than that of Knights of the Grand Cross on the breast. •
Knight/Dame Commander (KCPO/DCPO): who wear the decoration at the neck. •
Knight/Dame (KPO/DPO): who wear the star on the left breast. , re-instituted the Pian Order under his Papal name and
pontificate in 1847. ==Insignia and uniform==