Strzygowski zeros in on these columns because they are examples in his view of late antique Antiochene artistry. They are indeed splendid creations. We reproduce a photograph of one of them here.
His focus, beyond the elaborate decoration, is on the sculptor's seal/monogram on the column. This seal can be seen in the middle section of the column in the central panel with two examples.
Here it is up close:
In his opinion, this elaborate little symbol is a combination of the consonants, N,T & X and represents a sign to the observer in the age when it was created (originally for the church of Saint Saba in Acre) that the artisan was from Antioch. The rest of the seal's details elucidate the identity of the long-lost stone worker who carved the column(s).
We include this detail here because, somehow, somewhere, at some moment, some decent example(s) of Antiochene sculpture will be brought to daylight and when this occurs, the appearance of a similar symbol somewhere on the work will give away that this too was a work from a master craftsmen from ancient Antioch.