The Pope's guards and palace units are same Frankish soldiers.
Pope's personal escort (and Royal banner):
Consilium Papicus
Pope's Kingmen aka Palace guards.
Milites Papicus
Dismounted Kingsmen
Milites Descensi Papicus
These warriors were attached to Pope's Guard not only for his safety but to ensure the political influence of the Frankish Empire over the Pope's desisions.
Lombard heavy infantry in service of the Pope.
Miles Papicus
many Lombard minor warlords offered their soldiers to Pope to gain his favor over political disputes amongst their Duchies or amongst them and the Franks.
Often those heavy infantrymen was what the latium plain needed to dfend against invadors.
Italian militia spear:
Servus Papicus
Most Italian cities had long ago organised militia forces that we met in the Lombard preview. But arround Rome , Italian population , the last leftovers of the Roman citizens formed a rather police force to keep the Papal State civil peace.
They were light infantry that did not offer much against heavily armed enemies but a spear could be leathal anyway!
Compared to Servus Veneticus they had atleast bronze or iron helmets to add to their protection.
Papal state like Lombards, Venice and Romans have full acess to all four Italian militia units you can see in the Lombards preview.