Posted on 13 May 2015
The columns are Greek or Roman Corinthian architecture. One of those may be a clue.
It looks like quite a few words have one uncommon letter of the alphabet. And the ones that don't have more than one occurrance of a different letter. There's a third letter that also matters.
Extract the X's, V's and I's from the words and phrases to make Roman numerals. Then convert those numbers to letters of the alphabet:
BIKINIS III 3 C EXOTOXIN XXI 21 U EXTRAVAGATING KIWIS XVIII 18 R EXERT SIX XIX 19 S XEROXING XXI 21 U EXPO SIXTY XIX 19 S
POXVIRUS XVI 16 P EXOTOXINS XXI 21 U AIRSHIP II 2 B EXHIBIT XII 12 L JINX IX 9 I INFINITE III 3 C EXOTOXIN XXI 11 U EPOXY QUIXOTES XIX 19 S
The solution is stl.la/cursuspublicus .