The evergreen palm trees symbolizing eternal love, deliberately hearkened to Psalm 92&colon;12. The political organization hearkened back to the steppe-nomadic system of patronage introduced by Genghis Khan. The style hearkened back to the European designs of the 11th and 12th centuries. Costume and design themes hearkened back to the "Citizen Kane" period. This piece involved many new ideas, although it also hearkened back to earlier pieces. In some cases, these services clustered around institutions that hearkened back to Illinois's earlier economies.