archaistic

Pertaining to an archaist; deliberately archaic, old-fashioned in an affected way.

The emperor Augustus introduced an archaistic revival of ancient virtue and ancient religion, which caused the poem of Lucretius On the Nature of Things to become unpopular, and it remained so until the Renaissance.

Archaistic themes, motifs, items, etc.

As in the case of Renaissance Italy, it is precisely the presence of the archaistic in the modern that is so fascinating to the cultural historian.