In the later 10th Century the German Emperor donated an extensive region in
Krain to bishop Abraham of Freising ( 993/994). The 3 legal instruments include
typical clauses of immunity, two of them contain also the ambivalent term »decanus«,
that can be identified as a term of the manorial systém, meaning a lower administrative position. But how were the new possessions protected against violation? Sure, there was the secular shield of »Königsschutz«, but could even canon law protéct the
flew areas? Does the CDP as one the most voluminous collections of pre-Gratian canon law, redacted in the early llth Century in Bawarian Freising, contain such regulars
and are there roots for them there already in the later 10th Century? Dealing with the
contempory manuscipts clm. 6426 (the famous handbook of bishop Abraham for
missionary activities in Carinthia) and two collections of canones ofthe later 10th Century (clm. 6241, clm. 6245 of the Bayerische Staatsbibliothek) it is shown, that no specific reaction by special canons can be found, but the major instrument of excommunication is present for defence against violations of ecclesiastical possession, based on
the »bannus episcopalis« and used in combination with repressive sanctions like penitential fasting, fines and excommunication. At last it can be shown as one of Abrahams
successors used A.D. 1080 the »bannus episcopalis« this way for defending immunity of
Freisingian land.