Archaeologism

Here is a liturgical revival which is within the potentialities of the humblest parish church or chapel and which is in no danger of degenerating into archaeologism, ritualism or aestheticism.

Source: wiktionary

Paraliturgies are especially helpful to show the student the style of liturgical procedure, and start situating him for initiation into deeper faith. This assists sacramental pedagogy to escape the accusation of archaeologism or "another class", and rather helps students experience involvement in the sacramental idea.

Source: wiktionary

He also objects to something else, however, namely, "the romantic archaeologism of certain professors of liturgy who would throw out everything done after Gregory the Great as being an excrescence and a sign of decadence.

Source: wiktionary