Hamilton 552, 11th Century Latin Psalter with Uninterpolated Latin Credo

 Uninterpolated Credo in 11^th Century Latin liturgical book from Germany (though, this Psalter may have a connection with Durham, England?):

https://digital.staatsbibliothek-berlin.de/werkansicht?PPN=PPN736607951&PHYSID=PHYS_0399&DMDID=DMDLOG_0006

MS Hamilton 552:

http://musmed.eu/source/8815

is an 11^th Century Medieval Psalter Book, with additional Divine Office prayers, etc. It contains, at the end of the Psalter, like other Medieval Psalters, various Canticles, as well as versions of the Credo; often one only sees the Apostles’ Creed. In this particular Latin Psalter from 11^th Century Germany, on page 339, however, there is the Nicene-Constantinopolitan Creed (Symbol), in an unadulterated form, in Latin (but with transliterated Greek interlinear).

 Thus it reads in the section concerning the Holy Ghost:

[Latin]

“Et in Spiritum Sanctum, Dominum et Vivificantem, Qui ex Patre Procedit, Qui cum Patre et Filio simul adoratur et conglorificatur, Qui locutus est per Prophetas.”

[And in the Holy Ghost, the Lord and Lifegiver, Who from the Father Proceedeth, Who with the Father and the Son together is adored and glorified, Who spake through the Prophets.]

At the very least, historiography will have to admit that there were several places and traditions in the West even in the 11^th century that resisted any interpolation.